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Social Statistics Managing Data Conducting Analyses Presenting Results 3rd Edition Thomas J. Linneman - Solutions

Oil content of fried sweet potato chips. Refer to the Journal of Food Engineering (Sept. 2013) study of the characteristics LO3 of fried sweet potato chips, Exercise 8.122 (p. 450).Recall that a sample of 6 sweet potato slices fried at 130°using a vacuum fryer yielded the following statistics on
Cognitive impairment of schizophrenics. Refer to the LO3 American Journal of Psychiatry (Apr. 2010) study of the differences in cognitive function between normal individuals and patients diagnosed with schizophrenia, Exercise 9.16(p. 476). Recall that the total time (in minutes) a subject spent on
Hygiene of handshakes, high fives, and fist bumps. Refer LO3 to the American Journal of Infection Control (Aug. 2014)study of the hygiene of hand greetings, Exercise 9.24(p. 479). The number of bacteria transferred from a gloved hand dipped into a culture of bacteria to a second gloved hand
How do you choose to argue? Refer to the Thinking and Reasoning (Oct. 2006) study of the cognitive skills required for successful arguments, presented in Exercise 9.25 (p. 479). Recall that 52 psychology graduate students were equally divided into two groups. Group 1 was presented with arguments
Bulimia study. Refer to Exercise 9.19 (p. 477). The “fear of negative evaluation” (FNE) scores for the 11 bulimic females and 14 females with normal eating habits are saved in the BULIMIA file. The confidence interval you constructed in Exercise 9.19 requires that the variance of the FNE scores
Children’s recall of TV ads. Refer to the Journal of Advertising (Spring 2006) study of children’s recall of television commercials, Exercise 9.17 (p. 477). You used a small-sample t test to test the null hypothesis H0: 1m1-m22 = 0, where m1 = mean number of ads recalled by children in the
Hippo grazing patterns in Kenya. In Kenya, humaninduced land-use changes and excessive resource extraction have threatened the jungle ecosystem by reducing animal grazing areas and disrupting access to water sources. In Landscape & Ecology Engineering (Jan. 2013), researchers compared hippopotamus
Independent random samples were selected from each of two normally distributed populations, n1 = 6 from population 1 and n2 = 4 from population 2. The data are shown in the following table.Sample 1 Sample 2 LO3 3.1 2.3 4.3 1.4 1.2 3.7 1.7 8.9.6 3.4a. Test H0: s1 2= s2 2 against Ha: s1 2 6 s2 2 .
Independent random samples were selected from each of two normally distributed populations, n1 = 16 from population 1 and n2 = 25 from population 2. The means and variances for the two samples are shown in the following table. LO3 Sample 1 Sample 2 n1 = 16 n2 = 25 x1 = 22.5 x2 = 28.2 s1 2= 2.87 s2
Specify the appropriate rejection region for testing against H0: s1 2= s2 2 in each of the following situations:a. Ha: s1 2 7 s2 2 ; a = .05, n1 = 20, n2 = 25b. Ha: s1 2 6 s2 2 ; a = .05, n1 = 15, n2 = 10c. Ha: s1 2 s2 2 ; a = .10, n1 = 31, n2 = 21d. Ha: s1 2 6 s2 2 ; a = .01, n1 = 41, n2 = 31
For each of the cases that follow, identify the rejection region that should be used to test H0: s1 2= s2 2 against Ha: s1 2 s2 2 . Assume that n1 = 9 and n2 = 18. LO3a. a = .20b. a = .10c. a = .05d. a = .02
For each of the cases that follow, identify the rejection region that should be used to test H0: s1 2 LO3= s2 2 against Ha: s1 2 7 s2 2 . Assume that n1 = 30 and n2 = 20.a. a = .10b. a = .05c. a = .025d. a = .01
Given n1 and n2, find the following probabilities:a. n1 = 5, n2 = 3, P1F Ú 14.882 LO3b. n1 = 6, n2 = 12, P1F 6 4.822c. n1 = 50, n2 = 26, P1F 6 2.3572d. n1 = 9, n2 = 50, P1F 6 3.822
Use the F-tables in Appendix B or statistical software to find each of the following F-values: LO3a. F.05, where n1 = 8 and n2 = 5b. F.01, where n1 = 20 and n2 = 14c. F.025, where n1 = 10 and n2 = 5d. F.10, where n1 = 20 and n2 = 5
True or false. H0: s1 2= s2 2 is equivalent to H0: s1 2 >s2 2 LO3= c where c 1.
True or false. The F-statistic used for testing H0: s1 2 LO3= s2 2 against Ha: s1 2 7 s2 2 is F = 1s122> 1s222.
Describe the confidence interval for 1s122> 1s222. LO3
Describe the sampling distribution of 1s122> 1s222 for normal data and give the assumption about the population and sample. LO3
In Example 9.4 (Section 9.2), we used the two-sample t-statistic to compare the mean reading scores of two groups of “slow learners” who had been taught to read by two different methods. The data are repeated in Table 9.10 for convenience. The LO3 use of the t-statistic was based on the
Find the p-value for the test in Example 9.10, using the F-tables in Appendix A.Compare this with the exact p-value obtained from a computer printout. LO3
experimenter wants to compare the metabolic rates of white mice subjected to different drugs. The weights of the mice may affect their metabolic rates; thus, the experimenter wishes to obtain mice that are relatively homogeneous with respect to weight. Five hundred mice will be needed to complete
Scouting an NFL free agent. In seeking a free-agent NFL running back, a general manager is looking for a player with high mean yards gained per carry and a small standard LO3 deviation. Suppose the GM wishes to compare the mean yards gained per carry for two free agents, on the basis of independent
Rat damage in sugarcane. Poisons are used to prevent rat damage in sugarcane fields. An agriculture department is investigating whether the rat poison should be located in the middle of the field or on the outer perimeter. One way to answer this question is to determine where the greater amount of
Do video game players have superior visual attention skills? Refer to the Journal of Articles in Support of the Null Hypothesis (Vol. 6, 2009) study comparing the visual attention skill of video game and non-video game players, Exercise 9.22 (p. 478). Recall that there was no significant difference
Cable-TV home shoppers. All cable television companies carry at least one home-shopping channel. Who uses these LO3 home-shopping services? Are the shoppers primarily men or women? Suppose you want to estimate the difference in the percentages of men and women who say they have used or expect to
Solar energy generation along highways. Refer to the International Journal of Energy and Environmental Engineering (Dec. 2013) study of solar energy generation along highways, Exercise 9.47 (p. 491). Recall that the LO3 researchers compared the mean monthly amount of solar energy generated by
A long-standing topic in the social sciences is the authoritarian personality: there are certain characteristics that lead people to favor a very strong government. One of these factors is trust. Is trust related to favoring a strong leadership? Using the WVS dataset, run a simple regression using
Run a correlation matrix using the following WVS variables related to election corruption: ELECBRIBE, ELECPREVENT, ELECRICHBUY, and ELECVIOL.Which variables are most correlated with one another? Which variables are least correlated with one another? What does this tell you about the nature of
Using the PewSocialMedia dataset, run a regression to analyze the relationship between income (use the recoded XYincome variable) and the respondent’s score on the Index of Cellphone Uses. Interpret your results, and assess both the statistical and substantive significance of the slope.
Using the PewSocialMedia dataset, run a regression to analyze the relationship between education (use the recoded XYeduc variable) and the respondent’s score on the “Index of Upsettedness.” Interpret your results.
Using the PewSocialMedia dataset, run a regression to analyze the relationship between age and the number of texts the respondent sends per day (as measured by the recoded variable XYtextnum1). Interpret your results.
Using the PewWorkPlay dataset, run a regression that addresses this question: does age significantly affect one’s score on the “Ease of Technology Use for Job Search”index? Interpret your results.
Using the PewWorkPlay dataset, run a regression that addresses this question: does years of education significantly affect one’s score on the “Concern about Job” index?Interpret your results.
Using the PewWorkPlay dataset, run a correlation matrix using the six variables regarding attitudes toward video games (use the recoded XYgameatt variables).Describe which variables are least and most correlated with each other, and what this tells you about the connections among people’s
Does parents’ checking and blocking behavior affect kids’ behavior, or is it more the kids’ perceptions of what parents do in this respect? Use the Child’s Own Cyberbullying Enabling Index from the PewKids dataset as your dependent variable, and then run two regressions: one with the
Do kids engage in a higher frequency of bad cyberbehavior as they get older? Use the Child’s Bad Cyberbehavior Index in the PewKids dataset as your dependent variable, and use child’s age as your independent variable. Interpret your results.
Among the elderly, is there a relationship between education and health? Using the PewHealth dataset, select cases so that you are looking only at those aged 80 and older. Assess the relationship between years of education (use the recoded variable)and the Health Conditions Index. After completing
Select cases in the PewHealth dataset so that you are analyzing only the Asian respondents. Assess the relationship between years of education (use the recoded variable) and the Internet Health Use Index. After completing this exercise, be sure to go back into the Select Cases box and get all of
Often, various health conditions are related. That is, if one has one condition, one is likely to have another condition. Using the PewHealth index, run a correlation matrix using the five recoded health condition variables (leave out the variable for “other conditions”). Which health
I used another one of the ANES Unique Groups—strong Republicans who have twice voted for Obama—and ran a sample regression equation using the economic peril index as my dependent variable and family income as my independent variable.Here are some results:Standard Deviation of the Dependent
I used one of the ANES Unique Groups—those who rated Christian Fundamentalists and atheists at 100 on the feeling thermometer—and ran a simple regression equation using the abortion index as my dependent variable and number of times attend religious services per month as my independent
Many people claim that after the election of Barack Obama, the racial terrain of the United States has changed. Others claim that resentment still lingers. Run a simple regression equation using the ANES Obama feeling thermometer as the dependent variable and the Resent Blacks Index as the
Which political party has the most dedicated constituencies? Looking at correlations among various ANES feeling thermometers that are stereotypically associated with the major political parties is a good way to look for such connections. Run one correlation matrix using the following feeling
Younger people these days are developing a reputation for not caring about privacy.Therefore, we might expect that the younger you are, the less concerned you might be about the government’s wiretapping. Run a simple regression equation using ANES data, using the recoded age variable as your
A common lament is that younger people don’t follow the news any more. Is this a valid observation? The ANES asks respondents how many times a week they review news on the Internet, read a physical newspaper, listen to the news on the radio, and watch the news on television. Using these four
Several of the ANES feeling thermometers concern religion. Run three simple regression equations, all of them using the Christian Fundamentalist feeling thermometer as your independent variable. For the first equation, use the Mormon feeling thermometer. For the second equation, use the Muslim
how a researcher used regression to study how family size and grades are related
how a researcher used regression to study the relationship between housing appreciation and support for social security
the role of sample size in testing a slope for significance
how to test a slope for statistical significance
what the standard error of the slope really means
one last probability distribution, this time using sample slopes
Do groups of countries differ on their confidence in banks? Using WVS data, run an ANOVA using the COUNTRY6CAT and CONBANKS variables. Then, by selecting cases, remove the set of countries with the least support for banks and the set of countries with the most support for banks and rerun the ANOVA.
Under communism, there was limited freedom of choice. Do these countries remain less free in this sense than the countries of Western Europe? Use the WVS variable FREEDOM in a t-test to find out, comparing the Eastern Europe group of countries and the Western Europe(along with the U.S., Australia,
Under communism, religion was frowned on in the countries of Eastern Europe. Do these countries remain less religious than the countries of Western Europe? Use the WVS variable RELPERSON in a t -test to find out, comparing the Eastern Europe group of countries and the Western Europe (along with the
Using the PewSocialMedia dataset, address the following question: does where you live affect how many people you email per day? Run an ANOVA to contrast people who live in urban, suburban, and rural areas on the recoded XYemail-people variable.
Using the PewSocialMedia dataset, address the following question: do men and women differ in the extent to which they use Facebook for various activities? Run a t-test to contrast men and women on the number of times/week they do a variety of Facebook activities (the recoded variable XYfbuseindex).
There is a stereotype that men are willing to talk about something, even if they admit that they don’t know anything about that something. Using the PewSocial-Media dataset, first select cases so that you’re looking at only those people who said they are “not at all knowledgeable about the
Using the PewSocialMedia dataset, address this question: does being married/ partnered have an effect on how upset you are over things that happen in your life? Run a t-test using the “Index of Upsettedness,”comparing those who are married/partnered with those who are not married/partnered (use
Use the PewWorkPlay dataset to run an ANOVA that compares the three political party groups (Democrats, Republicans, and Independents) on the“Concern about Job Index.” Describe your results, and answer this question: which ANOVA-related problem talked about in this chapter does this exercise
Use the PewWorkPlay dataset to build a table that makes three t -test comparisons on the “Concern about Job Index”: 1. those who say their job involves interacting with customers, and those who don’t; 2. those who say their job involves doing the same thing over and over, and those who
Use the PewWorkPlay dataset to address this question: do the populations of men and women differ in how they feel about online dating, as measured by scores on the Online Dating Attitude Index?
Does geography influence texting? Perhaps kids who live in communities with more face-to-face interaction text less than people from other types of communities. Using the PewKids dataset, run an ANOVA using the three types of communities and compare them on the number of texts per day variable.
Does experience with social networking make kids more savvy about what they post? Using the PewKids dataset, compare kids who say they have refrained from posting something online to kids who say they haven’t refrained from posting something online. Compare them on the Child’s Social Networking
Using the PewKids dataset, compare kids in married and divorced/separated families: Do they significantly differ on the Experiences with Being Bullied Index?
, let’s stay in Texas, and only look at the whites, blacks, and Hispanics. With regard to the PewHealth Health Conditions Index, is there a difference among these groups?
Just as in
When I lived in Texas, I recall leaving my city, Houston, and going out into the suburbs and rural areas and noticing very different levels of health. Is this reflected in the PewHealth data? Select cases to look only at Texans;then run an ANOVA to see if there are community differences with regard
Use the PewHealth dataset to address this question: Is there a difference between parents and nonparents with regard to the number of things they use their cell phones for (as measured by the Cellphone Use Index)?
Use the PewHealth dataset to address this question: is there a difference between men and women with regard to their willingness to seek out health information on the Internet (as measured by the Internet Health Use Index)?
Using the ANES unique group of sad men, here are the raw data for the recoded religious attendance variable for three groups on the Word of God variable:Literal Word of God: 0, 1.5, 3, 1.5, 8, 0 Word of God, not Literal: 4, 4, 0, 0, 8, 8 Not Word of God: 0, 0, 0, 0, 0, 0, 0 By hand, conduct an
Using ANES data, carry out an ANOVA that will allow you to see if you can claim that the four age categories differ (use the recoded age variable that has four age categories) on the Election Integrity Index. Explain your results.
Using ANES data, carry out an ANOVA using the Muslims Feeling Thermometer. Compare the groups on the original religion variable regarding the Bible (whether or not it is the word of God). Explain your results.
Among the ANES unique group of widows who have three or more children at home, is there a difference between those with a high school education or less and those who have some college or more with regard to household income? Here are the raw data:High school or less: 21.25, 2.5, 72.5, 2.5, 11.25
Among the ANES unique group of people who simultaneously rate Christian Fundamentalists and atheists at 100 on the feeling thermometer, is there a difference between men and women with regard to how they score on the Traditionalism Index? Here are the raw data:Men’s scores: 7, 10, 12, 11, 9, 10,
Most smartphones are made in China. If you have a smartphone, and you have it with you all the time, and you think it makes your life wonderful, are you perhaps less concerned about China’s progress? Run a t-test using ANES data comparing those who have smartphones with those who don’t have
Although poor people are the predominant recipients of welfare, they are not one and the same, especially with regard to how people feel about each group. Using ANES data, run t-tests comparing people who claim they are extremely liberal with those who claim they are extremely conservative.Compare
Do those who vote differ from those who don’t vote with regard to how much they trust the government? Using ANES data, run a t -test comparing those who voted in the 2012 election with those who didn’t vote. Compare them on the Trust in Government Index. Interpret your results.
how researchers used ANOVA to study the effects of pets at work
how a researcher used t-tests in her experiment on race relations
how researchers used t-tests to study gender overcompensation
the similarities and differences between ANOVA and the chisquare test
how ANOVA really works
conducting and interpreting an ANOVA
how a t- test really works
conducting and interpreting a t-test
building another probability distribution, this time a distribution of mean differences
In the WVS countries-as-cases dataset, we see that 34% of American respondents had a great deal or quite a lot of confidence in major companies. Can we build a confidence interval around this percentage, using information we have in the WVS dataset? Why or why not?
Use the five WVS variables that concern where people get their news:NEWSPAPER, NEWSTV, NEWSRADIO, NEWSMOBILE, NEWSNET.Run 95% confidence intervals for these variables, and then answer this question: which pairs of variables could feasibly have population means that are similar?
Using the PewSocialMedia dataset, run a frequency distribution that addresses this question: among those aged 35 and younger, what percentage of the sample uses Facebook? Then build a 99% confidence interval to address this question: is it possible that 100% of the population of those aged 35 and
Using the PewSocialMedia dataset, get a 95% confidence on the recoded variable “Number of Texts Sent Per Day” (XYtextnum1) for two groups:whites and non-whites. Present your confidence intervals, and give two reasons why one confidence interval is considerably wider than the other.
Using the PewSocialMedia dataset, get a 95% confidence interval on the variable “Index of Social Media Use” for three groups: those who live in urban areas, those who live in suburban areas, and those who live in rural areas. Present your confidence intervals, and explain which groups you can
Use the PewWorkPlay dataset to select cases so that you are looking only at white males 25 years or younger. Then find out what proportion of them say they have used a dating app on their phone. Then build a 95% confidence interval around this proportion to address this question: is it possible
Use the PewWorkPlay dataset to create 95% confidence intervals for the three groups in the recoded race variable (XYrace) on the Use of Social Media for Job Search Index. According to the confidence intervals, which population means might possibly be the same?
Use the PewWorkPlay dataset to create 95% confidence intervals for two groups— those who say their job requires specialized technical knowledge, and those who do not say this—on the “Concern about Job” index. Which confidence interval is wider? Describe two reasons why one confidence
We suspect that kids who sext (send nude photos by text) text more than kids who don’t sext. Using the PewKids dataset, get 95% confidence intervals that will help you address this suspicion. Based on the confidence intervals, could the population means be the same? What is problematic about the
Using the PewKids dataset, build confidence intervals by parents’ race. Use the Child’s Negative Social Networking Consequences Index as your variable of interest. Describe two reasons why the resulting American Indian confidence interval is comically wide in contrast to some of the other
Using the PewHealth dataset, find out what proportion of Hispanics in the sample don’t have health insurance (use the recoded race variable and the dichotomously recoded insurance variable), and, by hand, build a 99%confidence interval with this information.
In survey after survey, people from the state of Colorado are named the healthiest people in the United States. Use the PewHealth dataset to run 95% confidence intervals on the Health Condition Index for the various races. Warning: you’re going to get some odd results. Be sure to explain why
Here are the raw data for the ANES unique group of people in educationally unequal households:Economic Peril Index Score: 17, 13, 10, 12, 11, 21, 16, 16 Use these raw data to test the following claim: the population mean for people in educationally unequal households on the Economic Peril Index is

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