2.99 See Answer

Question: Refer to Exercise 14.29. If you


Refer to Exercise 14.29. If you wanted to determine whether the following pairs of means differ: PARTYID: 1 and 3, 1 and 5, 3 and 5, which multiple comparison method would you select? What value of a would you use? Perform the test.

Data from Exercise 14.29:
With government-funded health insurance in the air the next question may be particularly relevant. Is it government’s responsibility to help pay for doctor and hospital bills HELPSICK: 1 = Government should help; 2, 3, 4, 5 = People should help themselves)? Is there enough evidence to conclude that differences exist between the eight political categories?


> In recent years, women have made up an increasing proportion of university students. a. Is there sufficient evidence to conclude that females and males (SEX: 1 = Male, 2 = Female) differ in their years of education (EDUC)? b. What are the required condit

> Does the Earth go around the Sun, or does the Sun go around the Earth (EARTHSUN: 1 = Earth around Sun, 2 = Sun around Earth)? Correct answer: Earth around Sun.

> Refer to Exercise 12.139. The engineering team took samples of bridges in 2004, 2006, 2008, and 2010 and recorded whether each bridge was structurally deficient, functionally obsolete, or structurally sound. These three categories were recorded as 1, 2,

> True or false, the center of the earth is very hot (HOTCORE: 1 = True, 2 = False)? Correct answer: True.

> A doctor tells a couple that there is one chance in four that their child will have an inherited disease. Does this mean that each of the couple’s children will have the same risk of suffering the illness (ODDS2: 1 = Yes, 2 = No)? Correct answer: Yes.

> A doctor tells a couple that there is one chance in four that their child will have an inherited disease. Does this mean that if the first child has the illness, the next three will not (ODDS1: 1 = Yes, 2 = No)? Correct answer: No.

> Are foreign-born people (BORN: 1 = In the United States, 2 = Elsewhere) more likely to work for themselves (WRKSLF: 1 = Work for themselves, 2 = Work for someone else) than Americans born in the United States? Conduct a test to answer the question.

> Is there enough statistical evidence to conclude that people born (BORN: 1 = In the United States, 2 = Elsewhere) in the United States are more likely to work for the government (WRKGVT: 1 = Government, 2 = Other) than people born outside the United Stat

> It is generally understood that working for the government means more job security than working for private enterprise. Are married people (MARITAL: 1 = Married, 5 = Never married) more likely to work for the government (WRKGOVT: 1 = Government) than do

> Can we infer from the data that married and never married people (MARITAL: 1 = Married, 5 = Never married) differ in their completion of a graduate degree (DEGREE: 4 = Graduate degree)?

> Half a century ago men were far more likely to be the breadwinner and women were far more likely to be homemakers. There are now many households where women are the breadwinners and many households where both work outside the home. Is there a difference

> Is there enough statistical evidence to conclude that married people (MARITAL: 1 = Married, 5 = Never married) are more likely to work for themselves (WRKSLF: 1 = Work for themselves, 2 = Work for someone else) than married people?

> Are married people more likely to be working full time (WRKSTAT: 1 = Full time,)? Conduct a test to determine whether there are differences between married and never married (MARITAL: 1 = Married, 5 = Never married) American adults.

> Every year, there are more than 300,000 robberies in the United States. A researcher took a random sample of robberies in 2000, 2005, and 2010, and recorded the weapon used (1 = Firearm, 2 = Knife or other cutting instrument, 3 = Other, 4 = No weapon). I

> In theory, Republicans are more supportive of free enterprise. Do the data allow us to infer that Republicans (PARTYID3 1 = Democrat, 3 = Republican) are more likely to work for themselves (WRKSLF: 1 = Work for themselves, 2 = Other) than Democrats?

> Is working full time and earning more money than part time workers the prime reason why some people are Republicans. This raises the question, Is there sufficient evidence to conclude that Republicans (PARTYID3: 1 = Democrat, 3 = Republican) are more lik

> Can we infer from the data that Democrats (PARTYID3: 1 = Democrat; 3 = Republican) are more likely to work for the government (WRKGOVT: 1 = Government, 2 = Private enterprise)?

> Is there a difference between men and women in their preference for working for some government agency? Conduct a test to determine whether there is enough evidence to infer that women (SEX: 1 = Male, 2 = Female) are more likely to work for the governmen

> Is there sufficient evidence to conclude that foreign-born people (BORN: 1 = In the United States, 2 = Elsewhere) are more likely to have a graduate degree (DEGREE: 4 = Graduate) than people born in the United States?

> The deep recession of 2008–2010 may have changed patterns of employment. Because of the large number of layoffs an increasing number of individuals have chosen to work for themselves. Does this apply equally to men and women (SEX: 1 = Male, 2 = Female)?

> A generation ago men were more likely to attend university and acquire a graduate degree than women. However, women now appear to be attending university in greater numbers than men. To gauge the extent of the difference, test to determine whether men a

> Most people who work for someone else are likely to have a set number of hours that does not vary. In most cases this will be around 40 hours per week. Self-employed people do not have the luxury of having a limit on the hours they work. As a result we w

> There are advantages and disadvantages to working for one’s self. The advantages are that the rewards can be substantial. However it is also possible to have nothing to show for a lot of work. In theory the variation in income for self-employed individua

> Do most two-income families try to have both spouses work the same number of hours? To answer the question conduct a test to determine whether there is sufficient evidence to infer that the respondent and his or her spouse differ in the number of hours p

> After a thorough analysis of the market, a publisher of business and economics statistics books has divided the market into three general approaches to teach applied statistics. These are (1) use of a computer and statistical software with no manual calc

> The survey asks for total family income and respondents’ income. The difference between them is the amount earned by the members of the respondent’s family. Estimate with 95% confidence the mean income of the other members of the respondent’s family (INC

> Is there sufficient evidence to infer that Americans are more educated than their mothers (EDUC and MAEDUC)?

> The general trend over the last century is that each generation is more educated that its predecessor. Has this trend continued? To answer this question, determine whether there is sufficient evidence that Americans are more educated than their fathers (

> Repeat Exercise 14.98 for the 2012 General Social Survey. Data from Exercise 14.98: Is there sufficient evidence to conclude that there are differences in the years of education between American adults and their fathers and mothers (EDUC, PAEDUC, MAEDUC

> Is there sufficient evidence to conclude that there are differences in the years of education between American adults and their fathers and mothers (EDUC, PAEDUC, MAEDUC)?

> Perhaps another way to explain the outcome of the test in Exercise 13.59 is that Republicans wait longer to have children. a. Test to determine whether Republicans are older than Democrats (PARTYID3: 1 = Democrat; 3 = Republican) when their first child i

> Does education play a role to explain the results in Exercise 13.59. a. Test to determine whether there is enough evidence to infer that Republicans (PARTYID3: 1 = Democrat; 3 = Republican) more educated than Democrats (EDUC). b. Estimate the difference

> Refer to Exercise 13.59. If it is true that Republicans (PARTYID3: 1 = Democrat; 3 = Republican) have higher incomes than Democrats, is it because they work harder? a. Conduct a statistical test to determine whether Republicans work longer hours (HRS1).

> Republicans tend to prefer smaller less intrusive government and lower taxes. Is this because Republicans have higher incomes (PARTYID3: 1 = Democrat; 3 = Republican)? a. Do the data allow us to conclude that Republicans earn more income (RINCOME) than D

> In most countries including the United States, younger people tend to be on the left side of the political spectrum. If so, we would expect Republicans to be older than Democrats. a. Conduct a test to determine whether there is enough evidence to infer t

> The relationship between drug companies and medical researchers is under scrutiny because of possible conflict of interest. The issue that started the controversy was a 1995 case control study that suggested that the use of calcium-channel blockers to tr

> For Exercise 15.5, retest the hypotheses, assuming that the experiment involved twice as many trials (n = 300) and that the observed frequencies were twice as high as before, as shown here. Cell 1 2 3 4 Frequency 76 100 76 48

> Because many immigrants come to the United States with little money they often are willing to take risks that can result in high incomes. However, is this enough to overcome language and culture difficulties? a. Is there sufficient evidence to infer that

> Immigration has become an important topic in American politics. Some immigrants came to the United States to do jobs that Americans do not want to do. Many of these immigrants have little formal education. Other immigrants came to the United States with

> Some economists have theorized that one of the reasons that men earn higher incomes than women (SEX: 1 = Male, 2 = Female) is that men work longer hours (HRS1). a. Conduct a statistical test to determine whether this contention is true. b. Are the requir

> Study after study indicate that men earn higher incomes than women (SEX: 1 = Male, 2 = Female). a. To determine the extent of the differential in 2014 estimate the difference between male and female annual incomes (RINCOME). b. What are the required cond

> The upside to working for self-employment is that there is virtually no upper limit to income. If so, we would expect self-employed individuals (WRKSLF: 1 = Self-employed, 2 = Someone else) to have higher incomes (RINCOME). a. Conduct a test to determine

> As a general rule government employees (WRKGOVT: 1 = Government, 2 = Private) have more job security than do private sector employees. Do they also have higher incomes RINCOME)? a. Conduct a test to answer the question. b. Are the required conditions sat

> Refer to Exercise 14.34. Suppose that you want to determine which of the following pairs of means differ (POLVIEWS: 1 and 2, 1 and 3, 2 and 3). a. Which technique should you use? b. Use the technique and describe your results. Data from Exercise 14.34:

> Refer to Exercise 14.39. Use Tukey’s multiple comparison method to determine which pairs differ. Data from Exercise 14.39: Television networks and their advertisers are constantly surveying viewers to determine their likes and dislikes and how much time

> a. Use the analysis of variance to determine whether there is enough evidence to conclude that there are differences in the years of education (EDUC) between the liberals, moderates, and conservatives (POLVIEWS3: 1 = Liberal, 2 = Moderate, 3 = Conservati

> Refer to Exercise 14.31. Apply Tukey’s multiple comparison method to test for differences in income for each pair of political views. Data from Exercise 14.31: What happens to Americans’ political philosophies as they grow richer? If they change we woul

> (Exercise 2.44 revisited) The associate dean of a business school was looking for ways to improve the quality of the applicants to its MBA program. Inparticular, she wanted to know whether the undergraduate degree of applicants differed among her school

> Refer to Exercise 14.30. Suppose that you want to determine whether there are differences in the amount of education between each pair of liberals: POLVIEWS: 1 = Extremely liberal, 2 = Liberal, 3 = Slightly liberal. a. Which procedure should you use? b.

> Is it a myth that Democrats are more educated than Republicans and Independents? a. Use the analysis of variance to determine whether the years of education (EDUC) differ among Democrats, Independents, and Republicans (PARTYID3: 1 = Democrat, 2 = Indepen

> a. Use the analysis of variance to test for differences in the number of hours worked (HRS1) between races (RACE: 1 = White, 2 = Black, 3 = Other). b. Apply Tukey’s method to determine whether there are differences. c. Describe what you have discovered.

> a. Apply the analysis of variance to determine whether there is enough evidence to conclude that there are differences in income (RINCOME) between the races (RACE: 1 = White, 2 = Black, 3 = Other). b. Use Tukey’s method to determine which means differ.

> Refer to Exercise 14.27. a. Use Tukey’s multiple comparison method to determine which pairs of political parties differ. b. Use an appropriate method the compare the three Independents with the other. That is, test for the following pairs of means PARTYI

> Refer to Exercise 14.26. a. Apply Tukey’s multiple comparison method to determine which pairs of means differ. b. Use the Bonferroni adjustment test to determine whether there are differences between each of the following pairs of Independents: PARTYID:

> Refer to Exercise 14.25. a. Apply Tukey’s multiple comparison method to determine whether any means differ b. Is this result different from analysis of variance F-test? Data from Exercise 14.25: If differences in income exist, is it because higher-incom

> Refer to Exercise 14.24. Suppose that all you want to know is whether there are statistically significant differences in income between the three Independents (PARTYID: 2, 3, and 4). Perform the appropriate statistical procedure. Data from Exercise 14.2

> Refer to Exercise 14.23. a. Apply Tukey’s multiple comparison method to determine which pairs of means differ. b. Use the Bonferroni adjustment test to determine whether there are differences between each of the following pairs: PARTYID: 0 and 1, 0 and 2

> Because television audiences of newscasts tend to be older (and because older people suffer from a variety of medical ailments), pharmaceutical companies’ advertising often appears on national news on the three networks (ABC, CBS, and NBC). To determine

> Are government jobs more complex requiring more education than do private sector jobs? a. Test to determine whether there is enough evidence to conclude that government workers (WRKGOVT: 1 = Government, 2 = Private) have more education than do private se

> Another way to explain the results of Exercise 13.64 is to look at the differences in the number of hours of work. a. Is there sufficient evidence to infer that Conservatives work longer hours than Liberals (POLVIEWS3: 1 = Liberal, 3 = Conservative) (HRS

> We can attempt to explain the results in Exercise 13.63 by determining whether Conservatives are more educated than Liberals (POLVIEWS3: 1 = Liberal, 3 = Conservative). Test to determine whether Conservatives have more education than Liberals (EDUC). Wha

> As was the case with Democrats and Republicans we would expect that Conservatives would have higher incomes (POLVIEWS3: 1 = Liberal, 3 = Conservative) a. Conduct a statistical test to determine whether we can conclude that Conservatives, income exceeds t

> Is there sufficient evidence to infer that there are differences in marital status between people born in the United States and those born outside the United States (BORN: 1 = U.S., 2 = outside U.S.; MARITAL: Marital status: 1. Married, 2. Widowed, 3. Di

> Immigration has become a hot-button issue in American politics. One question that arises is: Are immigrants’ educational attainments differentfrom those born in the United States? Conduct a test to answer the question (BORN: 1 = U.S., 2 = outside U.S.; D

> Is there sufficient evidence to infer that support for capital punishment (CAPPUN: 1 = Favor, 2 = Oppose) is related to political affiliation (PARTYID3: 1 = Democrat, 2 = Republican, 3 = Independent)?

> In the last two decades, an increasing proportion of women have entered the workforce. Determine whether there is enough evidence to conclude that men and women (SEX) differ in their work status (WRKSTAT).

> The issue of gun control in the United States is one that is often debated particularly during elections. The question arises, What does the public think about the issue and does support vary from year to year? Test to determine whether there is enough e

> Are government workers more or less conservative than people who work in the private sector? Is there sufficient evidence to conclude that government workers (WRKGOVT: 1 = Government, 2 = Someone else) differ from private-sector workers in terms of their

> During the past decade, many cigarette smokers have attempted to quit. Unfortunately, nicotine is highly addictive. Smokers use a large number of different methods to help them quit. These include nicotine patches, hypnosis, and various forms of therapy.

> Do Americans who work for themselves (WRKSLF: 1 = Self-employed, 2 = Someone else) support the same political groups (PARTYID3: 1 = Democrat, 2 = Independent, 3 = Republican) as Americans who work for someone else? Conduct a statistical test to answer th

> Is it a myth that men are more conservative and women more liberal? Conduct a test to determine whether men and women (SEX: 1 = Male, 2 = Female) differ in their political views (POLVIEWS3: 1 = Liberal, 2 = Moderate, 3 = Conservative).

> Do foreign-born Americans differ from Americans born in the United States (BORN: 1 = Born in the United States, 2 = Born elsewhere) in their support of political groups (PARTYID3: 1 = Democrat, 2 = Independent, 3 = Republican)?

> An important element in the business of politics is to know who supports you and who doesn’t. Is there sufficient evidence to infer that men and women (SEX: 1 = Male, 2 = Female) differ in their support of the political groups (PARTYID3: 1 = Democrat, 2

> Which political party is more educated? Conduct a test to determine whether differences in education (EDUC) actually exist among some of the eight political categories.

> Has the amount of television American adults watch been constant over the years 2006, 2008, 2010, 2012, and 2014 or has the amount varied. Test to determine whether the number of hours of television per day (TVHOURS) changed over the 8-year span.

> Has educational levels kept uniform over the years 2006, 2008, 2010, 2012, and 2014? Conduct a test to determine whether the number of years of education (EDUC) differs in the 8-year period.

> Is it government’s responsibility to help pay for doctor and hospital bills (HELPSICK: 1 = Government should help; 2, 3, 4, 5 = People should help themselves)?

> Should government do more or less to solve country’s problems (HELPNOT: 1 = Government should do more; 2, 3, 4, 5 = Government does too much)?

> Should government improve standard of living of poor people (HELPPOOR: 1 = Government act; 2, 3, 4, 5 = People should help themselves)?

> (Exercise 2.45 revisited) Is there brand loyalty among car owners in their purchases of gasoline? To help answer the question, a random sample of car owners was asked to record the brand of gasoline in their last two purchases: 1 = Exxon, 2 = Amoco,3 = T

> Should government reduce income differences between rich and poor EQWLTH: 1 = Government should reduce differences; 2, 3, 4, 5, 6, 7 = No government action)?

> Do educated people work longer or shorter hours than do less-educated individuals? Conduct a test to determine whether there is enough evidence to conclude that differences exist in the number of hours per week (HRS1) between the five groups of education

> Television networks and their advertisers are constantly surveying viewers to determine their likes and dislikes and how much time adults spend watching television per day. Do the data allow us to infer that the amount of television (TVHOURS) differs by

> How does acquiring additional degrees contribute to higher incomes? Conduct a test to determine whether the degree holders (DEGREE: 0 = Left high school, 1 = High school, 2 = Junior college, 3 = Bachelor’s degree, 4 = Graduate degree) differ in income (R

> The survey asked, “Is it government’s responsibility to help pay for doctor and hospital bills (HELPSICK: 1 = Government should help; 2, 3, 4, 5 = People should help themselves)? Is there enough evidence to conclude that differences exist among some or a

> Can we infer from the data that there are differences between the seven political viewpoints in their answer to the question? “Should government do more or less to solve country’s problems (HELPNOT: 1 = Government should do more; 2, 3, 4, 5 = Government

> The survey asked, “Should government improve standard of living of poor people (HELPPOOR: 1 = Government act; 2, 3, 4, 5 = People should help themselves)?” Is there enough statistical evidence to conclude that some or all of the seven groups differ in th

> Is there enough evidence to infer that there are differences between the seven political viewpoints in their answers to the question. “Should government reduce income differences between rich and poor (EQWLTH: 1 = Government should reduce differences; 2,

> Is it true that younger Americans tend to be liberal and older Americans more conservative? To help discover the truth, start by determining whether there is enough statistical evidence to conclude that there are differences in age (AGE) among the seven

> Is it a myth that conservatives work harder than do liberals and moderates? Test to determine whether there are differences in number of hours of work per week (HRS1) among some or all of the seven political points of view.

> To determine the actual side effects, pharmaceutical companies often conduct studies that compare the side effects of their drug versus the side effects of a placebo. One such study examined the side effects of a new cold remedy. A random sample of 250 p

> What happens to Americans’ political philosophies as they grow richer? If they change we would expect differences in income (RINCOME) between the seven groups. Is there enough evidence to conclude that such differences exist?

> Are liberals, moderates, and conservatives all equally educated? Test to determine whether differences exist among the seven political views in the amount of education (EDUC).

> With government-funded health insurance in the air the next question may be particularly relevant. Is it government’s responsibility to help pay for doctor and hospital bills HELPSICK: 1 = Government should help; 2, 3, 4, 5 = People should help themselve

> The question that the survey asked is, “Should government do more or less to solve country’s problems (HELPNOT: 1 = Government should do more; 2, 3, 4, 5 = Government does too much)? Can we infer from the data that there are differences among some or all

> Is there enough statistical evidence to conclude that the eight political categories differ in their responses to this question, “Should government improve standard of living of poor people (HELPPOOR: 1 = Government act; 2, 3, 4, 5 = People should help t

> The survey asked the question, “Should government reduce income differences between rich and poor (EQWLTH: 1 = Government should reduce differences; 2, 3, 4, 5, 6, 7 = No government action)? Is there enough evidence to infer that there are differences am

> Refer to Exercise 14.24. If differences in income exist, is it because higher-income Americans work harder? Can we conclude from the data that there are differences in the hours worked (HRS1) between the eight political groups? Data from Exercise 14.24:

> Does income affect the way Americans choose which party to support? Conduct a statistical procedure to determine whether there are differences in income (RINCOME) between some or all of the eight political groups.

> Can we infer that the General Social Survey in 2014 overrepresented at least one education category (DEGREE)?

2.99

See Answer