Hypothesis Tests for Means and Proportions Research Paper

Hypothesis Tests for Means and Proportions - Research Paper Example Type I error is defined as the error of rejecting a null hypothesis when it is true. In this case type error would be the error of inferring that the bags are less than 12.0 ounces (less than claimed value) but in reality its weight is either 12.0 ounces or even greater. Level of significance refers to the probability of type I error, that means a fixed probability, in statistical hypothesis testing, of wrongly rejecting a null hypothesis Ho, when it is true. It is represented by . As evident from the given problem, the investigator had a doubt that the claimed weight of the potato bags is greater than the actual weight. To verify the authenticity of this claim, he collected some 30 bags and found the mean of those bags, which came out to be 11.9 ounces. Although the mean weight came out to be lesser than the claimed one. But the real question or logic behind hypothesis testing is that we want to ascertain that whether it would be appropriate to consider the difference of 0.1 ounces from observing 30 bags with the standard deviation of 0.4 a 'significant' one and infer this difference as on the entire population.

Diagnosis and treatment of male genitourinary Essay Example for Free

Diagnosis and treatment of male genitourinary Essay 1. What is a physician that specializes in the diagnosis and treatment of male genitourinary conditions called? Urologist 2. What disease causes the kidneys to overcompensate by straining within the remaining nephrons? Chronic Renal Failure 3. What are most kidney stones composed of? calcium-containing crystals 4. What are three types of bladder stones? Calcium, Uric acid, Struvite, and Cystine stones 5. A constriction of the perputial orifice that does not allow for the foreskin to fold back over the glans is called? paraphimosis 6. What is the term for the surgical removal of the uterus? Hysterectomy 7. What is the medical term for an examination/biopsy of the vagina and cervical areas? colposcopy 8. What disease or condition can lead to DUB (Dysfunctional Uterine Bleeding)? Menorrhagia, Metrorrhagia, and Polymenorrhea 9. How many days are used to calculate the EDD? The due date may be estimated by adding 280 days 10.What are the terms that describe the surgical removal of a fetus through an abdominal incision? caesarean section II. Go to http://www.aapc.com and answer the following questions: Q: For the CPCÂ ® certification, what are the specific eligibility requirements We recommend having an associate’s degree. Pay examination fee at the time of application submission. Maintain current membership with the AAPC. New members must submit membership payment with examination application. Renewing members must have a current membership at the time of submission and when exam results are released. All exams will be reported with exact scores and areas of study (65% or less).A CPC must have at least two years medical coding experience (members with an apprentice designation are not required to have two years medical coding experience.) Membership is required to be renewed annually and 36 Continuing Education Units (CEUs) must be submitted every two years for verification and authentication of expertise.

Relational Model Defined By Codds Twelve Rules Computer Science Essay

Relational Model Defined By Codds Twelve Rules Computer Science Essay This report tries to explain what Codds Twelve Rules means. And by comparing MySQL with relational model as defined by Codds Twelve Rules, this report also gives an abstract view on how MySQL comply with Codds Twelve Rules. This report is based on MySQL 5 InnoDB engine. Edgar F.Codd is famous for his contribution to relational model of database in 1970s. However, in 1980s the term relational was used by many database vendors to describe their database products which may not comply with the model that Edgar F.Codd has proposed. In order to clarify his model of relational database, and provide people a simple standard that can indicate to what extent a database software conforms to his model, the Codds Twelve Rules were propose. There are 13 rules in Codds Twelve Rules. Our textbook omits the first one,rule 0, so this report will start from the second one in Codds rules, rule 1. Rule 1: The Information Rule This rule requires all data in relational database management system(RDBMS) should be stored as values in tables at logical level. Some DBMS use Key-Value to store data, Redis for example, which contradict the Information Rule, so these DBMS will not be regarded as relational DBMS. MySQL dose store all data in the form of tables with values in columns of rows. Users can only access to values that are stored in tables. Even the data descript the database itself is store in tables, i.e. table tables in Information schema stores the description of all the tables that have been created. So, MySQL meets the requirement of rule 1. Rule 2: The Guaranteed Access Rule Users must be able to access to values by providing table name, the value of primary key and the name of the columns. In another word, the DBMS should support primary key in tables and enforce each tables contains primary key in order to prevent data duplication. MySQL does support to define primary key in tables. Yet, users can also create tables that dont have it. For example, create one table has columns a and b without primary key. In that circumstance, there may be several rows that has the same value in column a , preventing users to access to the value of column b in the row he want. So, MySQL does not fulfill the requirement of Rule2 and it gives user more flexibility by accepting tables without primary key. Rule 3: Systematic Treatment of NULL Values: The database must support NULL as a value other than 0 or empty string, as a representation of data missing or inapplicable. And the database can provide systematic way to manipulate NULL value. MySQL fulfill this requirement by supporting NULL value and treat it in a systematic way. In MySQL, NULL is supported and is regarded as missing data following ANSI/ODBC SQL standard. MySQL implements ternary logic. Users can not compare values with NULL, even NULL with NULL by using =, because NULL is missing data. The results of those compares are unknown. MySQL provides IS NULL and IS NOT NULL statement in order to treat the compares with value NULL. Rule 4: Active online catalog based on the relational model Data dictionary of one DBMS should be stored as ordinary data in the form of tables. Authorized users must be able to using the query language (SQL for example) that they used to query ordinary data to access to database catalog or structure. MySQL stores database catalog data using tables the same way it store ordinary data. These tables are in system database such as Information_schema. For example, table tables in Information_schema contains information about all tables in MySQL, like TABLE_NAME, TABLE_TYPE. Authorized users can use SQL to query this table in order to access to data catalog of current tables. So, MySQL well implements this Rule. Rule 5: Comprehensive data language The DBMS must support at least one language that can be used directly by users or within application queries. This language must also supports all aspects of database use including data (view) definition, data manipulations, integrity constraints, securities and transaction managements. SQL is a language that is comprehensive enough to support all these requirements. So, any DBMS that implements ANSI/ODBC SQL will comply with this rule. MySQL follows the ANSI/ODBC SQL standard, yet there are several differences between them in several cases. The difference can be seen in documents of MySQL. All these differences are just about statement syntax, i.e MySQL doesnt support select à ¢Ã¢â€š ¬Ã‚ ¦ into table, users should using Insert into à ¢Ã¢â€š ¬Ã‚ ¦ select to do the same works. But after all, all database use in MySQL can be implemented by using SQL regardless of whether the syntax is different from standard SQL. So, MySQL fulfills Rule 5. Rule 6: View Updating This rule means that the alteration that user makes in a view will result in the alteration of tables from which the view is created, if this view is theoretically updatable. In MySQL, many theoretically updatable views can be updated, yet, there are many limits. For example, due to the documentation of MySQL, delete and update cannot be used to update a view that has more than one underlying table. So, MySQL does not fulfill this rule. Rule 7: The RDBMS may handle individual records but it must primarily handle sets of records This rule means users can use one single command to query, insert, delete and update sets of values in multiple rows or multiple tables. MySQL can handle operation of multiple rows in one table. Because it uses SQL, that has commands that can handle operation of sets of records, as its data language. For example, MySQL can insert multiple records with this statement, INSERT INTO table_name (a,b,c) VALUES (3,4,5), (6,7,8)à ¢Ã¢â€š ¬Ã‚ ¦Ãƒ ¢Ã¢â€š ¬Ã‚ ¦. But MySQL cannot handle operation of sets of records that are from different tables in one command. But users can also handle this issue by using transaction that containing a series of SQL commands. So, MySQL implements this rule by allowing user to operate command on multiple rows in one table, while does not support operation of multiple tables in single command. Rule 8: Physical Data Independence This rule means that alterations that have been made to database in physical level, for example, export one database, and open it in another computer will not result in the changes in logical level. And users can still access to the data without altering their commands. MySQL can export one database by creating back up file. This file can be restore by MySQL in another computer. The physical underlying of this database has changed while the table structure will not be changed and users can access to this restored one without any adjustment on their queries. So, MySQL does provide some extent of physical data independence in InnoDB engine. However, if users want to change the store engine of a table from transactional one to non-transactional, the logical level will also change. In sum, MySQL provide physical data independence in InnoDB engine, but changing the store engine may result in change in database logic. Rule 9: Logical Data Independence This rule means that the changes of logical level in the database will not lead to changes of queries that based on former structure. For example, users can split one table into two, while use the same query as before. In MySQL, adding columns to a table will not require changes in application or queries that are base on the structure of this table. However, other changes of logical level, such as combine two tables into one, may call for an alteration of the application based on the structure. So, MySQL does not comply with this Logical Data Independence rule. Rule 10: Integrity Independence This means that integrity definition of data in one DBMS should be regarded as one part of data dictionary, and be stored in the same form as ordinary data. This also requires that this integrity definition can be access by users using language, SQL for example, to query, define or alter the integrity independence. MySQL fulfills this rule. It stores data dictionary in tables in information schema. For example, the column COLUMN_KEY in the table COLUMNS defines whether this column is primary key or has other constraints. And KEY_COLUMN_USAGE table defines which key columns have constrains. Users can access to integrity definition data by query these tables using ordinary SQL statement. Rule 11:Distribution Independence Today, many DBMS introduce the function to using distribute data in different locations. However, due to this rule, where this data be distributed and how DBMS manage them should not be visible to users. Users can use the data in the same way as they use data that been stored in one place. The InnoDB engine does not provide the ability to store data in different locations. MySQL has a distributed engine called MySQL Cluster. In InnoDB engine, MySQL introduce XA Transaction which is based on X/Open XA specification since 5.0.3. This specification provides users the ability to employ multiple resources in one transaction. However, users must know the underlying works, and if the structure of the distributed DBMS changes, the XA Transaction statement may also need to be adjusted. So, MySQL does not comply with the rule 11. Rule 12: The Nonsubversion Rule Sometime the DBMS provide API or other low-level interface for users to handle complicated transactions. However, those interfaces must not break all the rule above and bypassing integrity constraints and security. MySQL provides APIs for different applications or programming languages as low-level interface. There are back doors in them, custom command SHOW for example. However, these backdoors are only maintained for the compatibility with the former edition. Summary In Sum, due to the comparison between MySQl and Codds rules, MySQL implement most of these rules, though there are still some limitations. It can be regarded as a DBMS that is relational.

Jumping Off a Cliff Essays -- Personal Narrative, Essay About Myself

Jumping Off a Cliff As I inched my way toward the cliff, my legs were shaking uncontrollably. I could feel the coldness of the rock beneath my feet when my toes curled around the edge in one last futile attempt at survival. My heart was racing like a trapped bird, desperate to escape. Gazing down the sheer drop, I nearly fainted; my entire life flashed before my eyes. I could hear stones breaking free and fiercely tumbling down the hillside, plummeting into the dark abyss of the forbidding black water. The trees began to rapidly close in around me in a suffocating clench, and the piercing screams from my friends did little to ease the pain. The cool breeze felt like needles upon my bare skin, leaving a trail of goose bumps. The threatening mountains surrounding me seemed to grow more sinister with each passing moment, I felt myself fighting for air. The hot summer sun began to blacken while misty clouds loomed overhead. Trembling with anxiety, I shut my eyes, murmuring one last pathetic prayer. I gather ed my last breath, hoping it would last a lifetime, took a step back and plun...

Gender Development

Gender shapes the lives of all people in all societies. The term ‘gender’ refers to the social construction of female and male identity. It can be defined as more than biological differences between men and women. It includes the ways which those differences, whether real or perceived, have been valued, used and relied upon to classify women and men and to assign roles and expectations to them (http://en. wikipedia. org/wiki/Gender_and_development). Gender influences our lives, the schooling we receive, the social roles we play, and the power and the authority we command. Population processes – where women and men live, how they bear and rear children, and how they die – are shaped by gender as well (Riley, 1997). Several theories of gender development have generated most of the research during the past ten years: social learning theory, cognitive-development theory, and gender schema theory. Proponents of social learning theory believe that parents, as distributors of reinforcement, reinforce appropriate gender role behaviors. By their choice of toys, by urging boy or girl behavior, parents encourage their children to engage in appropriate gender-related behavior. Thus children are reinforced or punished for different kinds of behavior. They also learn appropriate gender behavior from other male or female models such as those in television shows. A second explanation, quite popular today, is found in cognitive-development theory, which derives from Kohlberg’s speculations about gender development. It is known that from Piaget’s work that children engage in symbolic thinking by about 2 years of age. Using this ability, Kohlberg believes, they begin the process of acquiring gender-appropriate behavior. A newer, and different, cognitive explanation is called gender schema theory. A schema is a mental blueprint for organizing information, and children develop gender identity and formulate an appropriate gender role. Consequently, children develop an integrated schema or picture, of what gender is and should be (Elliott et al. , 1996). Gender and Power Gender refers to the different ways men and women play society, and to the relative power they wield. While gender is expressed differently in different societies, in no society do men and women perform equal roles or hold equal positions of power. Power is basic fabric of society and is possessed in varying degrees by social actors in diverse social categories. Power becomes abusive and exploitive only when independence and individuality of a person or group of people becomes so dominant that freedom for the other is compromised. Women and children have open been on the abusive sides of power. Some causes that are often referred to are: the greater the physical strength that men tend to have creates the imbalance of power between men and women resulting from social structures and historical practices in regard to finances, education, roles of authority and decision making; the abuse of power by men and the failure of cultural pressures to prevent such abuse; and distorted view the sexuality and the objectification of the female. Max Weber in his ‘Essays in Sociology’ defined power as the likelihood a person may achieve personal ends despite possible resistance from others. Since this definition views power as coercive, Weber also considered ways in which power can be achieved through justice. Authority, he contented, is power which people determine to be legitimate rather than coercive. As a group, women are at a distinct advantage when considering both power and authority. Several factors act as determinants of the amount of power a person holds or can use in his/her relations with others: status resources, experience, and self-confidence. Males and females traditionally have had differing amounts of power at their disposal. By virtue of t6he male’s greater ascribed status in society, men have more legitimate power based on rank or position than do women. The serious social issue today is the relative inequities in social power between men and women. The issue of women’s power, relative to men, is not merely academic. Gender differences in power have real consequences for women. For example, although women have made significant gains in the workplace, with more women working than in the past and women possessing approximately a third of all management positions, women continue to experience wage discrimination, be excluded from the most powerful executive positions, advance more slowly in their careers, and experience fewer benefits from obtaining education or work experience, and are included in fewer networks and exert less authority (Colwill; Lyness and Thompson, 1997) than men in similar positions. A number of researchers have linked career advancement and access to benefits and resources within organizations to an effective use of power. An understanding of women’s power, relative to men, is therefore essential to overcoming women’s disadvantage in the workplace and other domains (http://www. find articles. com/p/articles/mi m0341/ is 1 55/ai 54831711). Gender and Education The past decade has witnessed a significant increase in the importance accorded to education, with both instrumental as well as intrinsic arguments made for increasing financial investment and policy attention to education provision. Investing in education is seen as one of the fundamental ways in which nation states and their citizens can move toward long-term development goals and improve both social and economic standards of living. The education of women is seen as providing the key to securing intergenerational transfers of knowledge, and providing the substance of long-term gender equality and social change. Although significant gains have been made in women’s education as a result of global advocacy, more often than not the gains are fragile, vulnerable to changes in economic and social environments, and lagging behind in male rates of enrolment and achievement. Achievements are particularly visible in the primary education sector, whereas gaps are still large in the secondary and tertiary sectors (unrsid. org/inrisd/website/nsf). Schools also reinforce gendered social roles. Researchers have documented the differential treatment accorded males and females in the classrooms that reinforces a sense of inferiority and lack of initiative among female students (Sadker and Sadker, 1988). Boys are far more likely to be given specific information that guides improvement of their performance (Boggiano and Barrett, 1991).

Founding of the Republican Party

Founding of the Republican Party The Republican Party was founded in the mid-1850s following the fracturing of other political parties over the issue of slavery. The party, which was based on stopping the spread of slavery to new territories and states, arose out of protest meetings which took place in a number of northern states. The catalyst for the founding of the party was the passage of the Kansas-Nebraska Act in the spring of 1854. The law was a major change from the Missouri Compromise of three decades earlier and made it seem possible that new states in the West would come into the Union as slave states. The change splintered both major parties of the era, the Democrats and the Whigs. Each party contained factions that either endorsed or opposed the spread of slavery into western territories. Before the Kansas-Nebraska Act was even signed into law by President Franklin Pierce, protest meetings had been called in a number of locations.   With meetings and conventions happening in a number of northern states, it is impossible to pinpoint one particular place and time where the party was founded.  One meeting, at a schoolhouse  in Ripon, Wisconsin, on March 1, 1854, is often credited as being where the Republican Party was founded. According to a number of accounts published in the 19th century, a convention of disaffected Whigs and members of the fading Free Soil Party assembled at Jackson, Michigan on July 6, 1854. A Michigan congressman, Jacob Merritt Howard, was credited with drawing up the first platform of the party and giving it the name Republican Party. It is often stated that Abraham Lincoln was the founder of the Republican Party. While the passage of the Kansas-Nebraska Act did motivate Lincoln to return to an active role in politics, he was not part of the group which actually founded the new political party. Lincoln did, however, quickly become a member of the Republican Party and in the election of 1860 he would become its second nominee for president. Formation of a New Political Party Forming the new political party was no easy accomplishment. The American political system in the early 1850s was complicated, and members of a number of factions and minor parties had widely varying degrees of enthusiasm about migrating to a new party. In fact, during the congressional elections of 1854, it seemed that most of the opponents to the spread of slavery concluded their most practical approach would be the formation of fusion tickets. For example, members of the Whigs and the Free Soil Party formed tickets in some states to run in local and Congressional elections. The fusion movement was not very successful, and was ridiculed with the slogan Fusion and Confusion. Following the 1854 elections momentum grew to call meetings and begin to seriously organize the new party. Throughout 1855 various state conventions brought together Whigs, Free Soilers, and others. In New York State, the powerful political boss Thurlow Weed joined the Republican Party, as did the states anti-slavery senator William Seward, and the influential newspaper editor Horace Greeley. Early Campaigns of the Republican Party It seemed obvious that the Whig Party was finished, and couldnt run a candidate for the presidency in 1856. As the controversy over Kansas escalated (and would eventually turn into a small-scale conflict dubbed Bleeding Kansas), the Republicans gained traction as they presented a united front against the pro-slavery elements dominating the Democratic Party. As former Whigs and Free Soilers coalesced around the Republican banner, the party held its first national convention in Philadelphia, Pennsylvania, from June 17-19, 1856. Approximately 600 delegates gathered, mainly from the northern states but also including the border slave states of Virginia, Maryland, Delaware, Kentucky, and the District of Columbia. The territory of Kansas was treated as a full state, which carried considerable symbolism given the unfolding conflict there. At that first convention, the Republicans nominated explorer and adventurer John C. Frà ©mont as their presidential candidate. A former Whig congressman from Illinois who had come over to the Republicans, Abraham Lincoln, was nearly nominated as the vice presidential candidate but lost to William L. Dayton, a former senator from New Jersey. The first national platform of the Republican Party called for a transcontinental railroad and improvements of harbors and river transportation. But the most pressing issue, of course, was slavery and the platform called for prohibiting the spread of slavery to new states and territories. It also called for the prompt admission of Kansas as a free state. The Election of 1856 James Buchanan, the Democratic candidate, and a man with an uncommonly long record in American politics won the presidency in 1856 in a three-way race with Frà ©mont and former president Millard Fillmore, who ran a disastrous campaign as the candidate of the Know-Nothing Party. Yet the newly formed Republican Party did surprisingly well. Frà ©mont received about a third of the popular vote and carried 11 states in the electoral college. All the Frà ©mont states were in the North and included New York, Ohio, and Massachusetts. Given that Frà ©mont was a novice at politics, and the party had not even existed at the time of the previous presidential election, it was a very encouraging result. At the same time, the House of Representatives began to turn Republican. By the late 1850s, the House was dominated by Republicans. The Republican Party had become a major force in American politics. And the election of 1860, in which the Republican candidate, Abraham Lincoln, won the presidency, led to the slave states seceding from the Union.

Free Essays on Stegner

â€Å"We simply need th[e] wild country available to us, even if we never do more than drive to its edge and look in. For it can be a means of reassuring ourselves of our sanity as creatures, a part of the geography of hope (153).† Wallace Stegner makes this statement at the end of â€Å"Coda†, a letter included in his book The Sound of Mountain Water. In this letter Stegner asks David Pesonen, who was working on the Outdoor Recreation Resources Review Commission, to work to preserve what wilderness is left in the United States. In publishing the letter in this book, Stegner is arguing not only to Pesonen but to the American people that wilderness is a necessary part not just of the physical American landscape, but the emotional and social landscapes as well. Throughout The Sound of Mountain Water Stegner relates his experiences traveling in the western United States, and in the second part reflects upon the ties of the western writer to history. This paper is mostly concerned with the first part of this book in which Stegner writes directly about his experiences with landscape. The book is a collection of writings that come from many different points in Stegner’s life, and therefore, throughout Part I of the book the reader is able to see the authors views change regarding certain environmental issues pertaining to the west. In the Introduction, Stegner writes, â€Å"†¦I am dismayed to find myself, in ‘The Rediscovery of America’, speaking admiringly of Hoover Dam and Lake Mead. I know better now†¦ But I have not changed the essay, or any of the essays†¦ They represent the way I felt when I wrote them (10).† Because of this, The Sound of Mountain Water reads somewhat like a literary time capsule , capturing Stegner’s views and responses to the landscapes he encounters, from the carefree â€Å"Rediscovery†¦Ã¢â‚¬  to the more philosophical and concerned â€Å"Coda†. The main points of this essay will relate the authors views and ... Free Essays on Stegner Free Essays on Stegner â€Å"We simply need th[e] wild country available to us, even if we never do more than drive to its edge and look in. For it can be a means of reassuring ourselves of our sanity as creatures, a part of the geography of hope (153).† Wallace Stegner makes this statement at the end of â€Å"Coda†, a letter included in his book The Sound of Mountain Water. In this letter Stegner asks David Pesonen, who was working on the Outdoor Recreation Resources Review Commission, to work to preserve what wilderness is left in the United States. In publishing the letter in this book, Stegner is arguing not only to Pesonen but to the American people that wilderness is a necessary part not just of the physical American landscape, but the emotional and social landscapes as well. Throughout The Sound of Mountain Water Stegner relates his experiences traveling in the western United States, and in the second part reflects upon the ties of the western writer to history. This paper is mostly concerned with the first part of this book in which Stegner writes directly about his experiences with landscape. The book is a collection of writings that come from many different points in Stegner’s life, and therefore, throughout Part I of the book the reader is able to see the authors views change regarding certain environmental issues pertaining to the west. In the Introduction, Stegner writes, â€Å"†¦I am dismayed to find myself, in ‘The Rediscovery of America’, speaking admiringly of Hoover Dam and Lake Mead. I know better now†¦ But I have not changed the essay, or any of the essays†¦ They represent the way I felt when I wrote them (10).† Because of this, The Sound of Mountain Water reads somewhat like a literary time capsule , capturing Stegner’s views and responses to the landscapes he encounters, from the carefree â€Å"Rediscovery†¦Ã¢â‚¬  to the more philosophical and concerned â€Å"Coda†. The main points of this essay will relate the authors views and ...