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Statistics 13th Global Edition James T. McClave And Terry T Sincich - Solutions

Using the PewHealth data, determine which of these factors have the largest impact on the Health Conditions Index: age, recoded education, and recoded income. Create a table that presents unstandardized and standardized coefficients. Interpret your results.
We know that there is a relationship between conservatives and big business, but let’s explore this relationship further. Use the ANES big business feeling thermometer as your dependent variable and the conservative and liberal feeling thermometers as your independent variables. Run this
Hillary Clinton comes to you and asks you which of the following three issues people most connect with her: abortion rights, gay rights, or health care? Use her ANES Feeling Thermometer as your dependent variable and then these three indices as your independent variables. Create a table suitable
Atheists are a much-maligned group in American society. Use the ANES Atheist Feeling Thermometer as your dependent variable and then the three other religion-oriented feeling thermometers (toward Christian Fundamentalists, Mormons, and Muslims) as your independent variables.Create a table that
It is commonly known that religion plays an important role in attitudes toward both abortion and homosexuality. However, do the various aspects of religiosity play the same role? Run two regressions using ANES data: in one, use the abortion index as the dependent variable; in the other, use the gay
Being engaged with the news is likely to make one more knowledgeable about politics, but are all types of news equally important? Use the ANES Knowledge Index as your dependent variable and the four media variables as your independent variables. Create a table that presents both the unstandardized
how a researcher used betas to study abortion attitudes and religion
how researchers used betas to study race and school discipline
how standardization and z-scores are related
how to standardize slopes and interpret them
why comparing regular regression slopes is problematic
If the percentage of a country that doesn’t want to live next to people who speak a different language goes up, does the percentage of a country that thinks that employers should give priorities to its own people over immigrants also go up? And does this relationship change once you control for
Using WVS data, we’ve seen that happiness is affected by health: the healthier a country’s people are, the happier they are. But what happens when we control for income (using the INCOMESCALE variable)? Could it be that richer countries are both happier and healthier? Run two regression models
In Chapter 9, one of the exercises addressed whether sets of countries differed in their attitudes toward homosexuality. An additional factor to consider is the fact that societal trust often plays a role: untrusting societies are particularly untrusting of outgroups (and homosexuality has
Use the PewSocialMedia dataset to run a set of nested regression models, using the Index of Cellphone Uses as your dependent variable. In the first variable, use only the age variable. In the second model, add the recoded smartphone variable. Create a professional-looking table of your results.Tell
Use the PewSocialMedia dataset to run a set of nested regression models to investigate the following hypotheses:1. Nonwhites are more upset (as measured by the Upsettedness Index)than whites.2. The relationship in Hypothesis #1 will go away once we control for the fact that nonwhites have people in
Using the PewSocialMedia dataset to run a set of nested regression models to investigate the following hypotheses:1. Having knowledge and interest about the U.S. surveillance program(as measured by the variable XYsurvintknowindex) increases one’s willingness to discuss this program (as measured
Use the PewWorkPlay dataset to build a set of nested regression models to address the following two hypotheses:1. Income affects score on the “Concern about Job” index.2. Once you take into account the fact that people with higher incomes tend to have more education, the difference from
Use the PewWorkPlay dataset to build a set of nested regression models to address the following two hypotheses:1. Older people have more negative attitudes than younger people about video games.2. Once you take into account the fact that older people are less likely to identify as gamers, the
Use the PewWorkPlay dataset to build a set of nested regression models to address the following two hypotheses:1. Older people are more skeptical than younger people about online dating.2. Once you take into account the fact that older people are less likely to have used online dating, the
I was the youngest of five kids, and my older siblings always complain that I got away with a lot more than they did. Use the PewKids dataset to see if older parents check/block their kids more than do younger parents (use the Parental Check & Block Index, actual parental behavior, not the
Use the PewKids dataset to build a set of nested models that investigates, first, whether black children are more or less likely to be bullied than white children (use the bullied index). Next, see if this difference is affected by controlling for family income (with the idea that richer kids will
Use the PewKids dataset to build a set of nested models that investigate the following possibilities. Perhaps kids who perceive that others’ engage in anti-cyberbullying behavior will engage in more of such behavior themselves. But perhaps such an effect could be because of gender: girls might
Someone uses the PewHealth dataset to run a regression model that shows that various types of non-married people have different average scores on the Cell-phone Use Index. Someone else looks at this regression model and says that these effects could really be caused by age: widowed people are
Using the PewHealth dataset, run a set of nested models using the Internet Health Use Index as your dependent variable. First, use the Health Conditions Index as your only independent variable. Then, add age as an independent variable. Create a table that presents the nested models and interpret
Those who use their cell phones for a wide variety of activities are more likely to use the Internet to find health information, but perhaps this is only because of age (younger people are more likely to use their cell phones for a wide variety of activities and to use the Internet to find health
In the news, it is often reported that younger people have much more positive attitudes toward gay policy issues than older people have. See if this is true according to ANES data by running a simple regression with age as the independent variable (the recoded version: age in years) and the Gay
Although immigrants to the United States come from all over the world, when many people think of immigrants, they think of Hispanics. Do Hispanics have different attitudes toward immigration than whites do?Using ANES data, run a regression that uses the Immigration Index as the dependent variable
What propels people to be involved in their communities? Income might play a role: households with higher incomes might give people the luxury of time to be involved. Using ANES data, run a simple regression using household income in thousands as your independent variable and the Involvement Index
Are women more concerned about discrimination against women than men are? Probably. But is this difference due to the fact that women tend to be more liberal than men? Using ANES data, run a simple regression model using the Women Discrimination Index as the dependent variable and gender as the
No surprise here: African Americans, on average, favor affirmative action more than whites do. Do feelings toward egalitarianism play a role in this difference? Run a simple regression with the ANES dataset using the Affirmative Action Index as the dependent variable and the dichotomous race
The 2010 health care act was highly controversial, and many people chose sides based on political party. Run a simple regression with ANES data that uses the Health Care Index as your dependent variable and the recoded party identification variable as your independent variable. Then, examine the
First, using ANES data, run a simple regression that investigates the relationship between age (use the recoded age variable) and environmental views (use the environmental index). Then, add political views to the regression model. Create a table that contains both models. Tell the story that these
how a researcher used nested models to study media and fear of crime
how researchers used nested models to examine how race affects grades
the importance of constant sample size
how to judge improvement from model to model
how to distinguish between an intervening variable and a suppressor variable
how to tell different types of nested stories
a different way to present regression results when you have multiple models
the logic of controlling
Do sets of countries differ in their attitudes toward homosexuality? One way to address this question is to examine the WVS variable NEIGHHOMO: the percentage of people who say they would not want homosexuals as neighbors. Use this variable as your dependent variable in a regression, and for your
Do sets of countries differ in their respect for religious diversity? One way to address this question is to examine the WVS variable NEIGHDIFREL:the percentage of people who say they would not want people of other religions as neighbors. Use this variable as your dependent variable in a
Using the PewSocialMedia dataset, run a regression to analyze the relationship between race (use the recoded race reference group variables)and the number of Facebook friends the respondent claims to have.Interpret your results.
Using the PewSocialMedia dataset, run a regression to analyze the relationship between community type (use the recoded community reference group variables) and the number of texts the respondent sends per day (use the recoded variable XYtextnum1). Interpret your results.
Using the PewSocialMedia dataset, run a regression to analyze the relationship between community type (use the recoded community reference group variables) and the respondent’s score on the Index of Interest and Knowledge in Surveillance Program. Interpret your results.
Does race affect use of the Internet in various ways? Using the PewWorkPlay dataset, run two regressions using the two Internet use indexes as your dependent variables and the two race reference group variables (XYraceREFblack and XYraceREFother) as your independent variables. Interpret your
Does geography affect concern about jobs? Using the PewWorkPlay dataset, run a regression using the “Concern about Job” index as your dependent variable and the two community reference group variables(XYcommREFrural and XYcommREFsuburb) as your independent variables. Interpret your results.
It is commonly believed that people from rural areas are more accustomed to dealing with one another face to face. Are they therefore more skeptical about online dating? Using the PewWorkPlay dataset, run a regression using the “Online Dating Attitude” index as your dependent variable and the
Use the PewKids dataset to run two regression models, both using family income as the dependent variable. In the first, use the five race referencegroup variables. In the second, use the race (white/nonwhite) dichotomy.After interpreting your results, address these questions: Which slopes in the
Does geography affect parental Internet surveillance behavior? In the PewKids dataset, use the Parental Checking and Blocking Index (what the parents actually do, not what the kids think they do) as your dependent variable and then community reference groups as your independent variables. Explain
Does having a smartphone increase the propensity to review health ratings on the Internet? Using the PewHealth data, run a regression with the Review Index as the dependent variable and the recoded smartphone variable as the independent variable, once using only white respondents, and once using
Use the PewHealth dataset to run a regression that contrasts whites with other racial groups on the Cellphone Use Index. How much variation do these variables explain? Make predictions for each racial group.
Use the PewHealth dataset to run a regression that contrasts whites with the other racial groups on the Health Conditions Index. How much variation do these variables explain? Which groups significantly differ from whites?
Does one’s personal employment situation affect how optimistic one is about the state of the economy? Run a regression equation that uses the ANES Economic Optimism Index as the dependent variable and the five employment-status reference-group variables (which use employed as the reference
Use three dichotomous ANES variables to explain some of the variation in how people feel towards gays and lesbians: gender, race (measured as white and black) and Bible belief (measured as Word of God or not Word of God).Write out your resulting equation. Develop two examples: the type of person
There is variation in people’s attitudes toward how big the government’s role should be. Does race and ethnicity play a role in explaining this variation? Run a regression equation using the ANES Government Role Index as your dependent variable and the three race reference-group variables as
Does education also affect one’s propensity to believe in various conspiracy theories? Use the ANES Non-Mainstream Views Index as your dependent variable and the four education-level reference-group variables for respondents as your independent variables (which use those with less than a high
Does greater education bring one a greater sense of political efficacy? Run a regression equation using the ANES political efficacy index as your dependent variable and the four education-level reference-group variables for respondents as your independent variables (which use those with less than a
how researchers used dichotomies and then reference groups to study the effect of judges’ daughters on judges’ decisions
how researchers used reference groups and then dichotomies to study gender differences in housework
how to use reference groups in regression
how to use dichotomies as independent variables in regression
Self-managed work teams and family life. To improve quality, productivity, and timeliness, more and more American industries are utilizing self-managed work teams (SMWTs).A team typically consists of 5 to 15 workers who are collectively responsible for making decisions and performing all tasks
MS and exercise study. A study published in Clinical Kinesiology (Spring 1995) was designed to examine the metabolic and cardiopulmonary responses during exercise of persons diagnosed with multiple sclerosis (MS). Leg-cycling and arm-cranking exercises were performed by 10 MS patients and 10
Gambling in public high schools. With the rapid growth in legalized gambling in the United States, there is concern that the involvement of youth in gambling activities is also increasing. University of Minnesota professor Randy Stinchfield compared the annual rates of gambling among Minnesota
Testing electronic circuits. Japanese researchers have developed a compression–depression method of testing electronic circuits based on Huffman coding (IEICE Transactions on Information & Systems, Jan. 2005). The new method is designed to reduce the time required for input decompression and
Instrument precision. The quality control department of a paper company measures the brightness (a measure of reflectance)of finished paper on a periodic basis throughout the day. Two instruments that are available to measure the paper specimens are subject to error, but they can be adjusted so
Identifying the target parameter. For each of the following studies, give the parameter of interest and state any assumptions that are necessary for the inferences to be invalid.a. To investigate a possible link between jet lag and memory LO3 impairment, a University of Bristol (England)neurologist
Pig castration study. Two methods of castrating male piglets were investigated in Applied Animal Behaviour Science (Nov. 1, 2000). Method 1 involved an incision in the spermatic cords, while Method 2 involved pulling and severing the cords. Forty-nine male piglets were randomly allocated to one of
Swim maze study. Merck Research Labs used the single-T swim maze to conduct an experiment to evaluate the effect of a new drug. Nineteen impregnated dam rats were allocated a dosage of 12.5 milligrams of the drug. One male and one female rat pup were randomly selected from each resulting litter to
Effectiveness of drug tests of Olympic athletes.Erythropoietin (EPO) is a banned drug used by athletes to increase the oxygen-carrying capacity of their blood.New tests for EPO were first introduced prior to the 2000 Olympic Games held in Sydney, Australia. Chance (Spring 2004) reported that of a
Light-to-dark transition of genes. Synechocystis, a type of bacterium that can grow and survive under a wide range of conditions, is used by scientists to model DNA behavior.In the Journal of Bacteriology (July 2002), scientists isolated genes of the bacterium responsible for photosynthesis and
Killing insects with low oxygen. Refer to the Journal of Agricultural, Biological, and Environmental Statistics(Sept. 2000) study of the mortality of rice weevils exposed to low oxygen, presented in Exercise 8.92 (p. 436).Recall that 31,386 of 31,421 rice weevils were found dead after exposure to
Identical twins reared apart. Because they share an identical genotype, twins make ideal subjects for investigating the degree to which various environmental conditions affect personality. The classical method of studying this phenomenon, and the subject of a book by Susan Farber(Identical Twins
Mongolian desert ants. Refer to the Journal of Biogeography (Dec. 2003) study of ants in Mongolia (central Asia), presented in Exercise 2.68 (p. 91). Recall that botanists placed seed baits at 5 sites in the Dry Steppe region and 6 sites in the Gobi Desert and observed the number of ant species
Patent infringement case. Chance (Fall 2002) described a lawsuit charging Intel Corp. with infringing on a patent for an invention used in the automatic manufacture of computer chips. In response, Intel accused the inventor of adding material to his patent notebook after the patent LO3 was
Reading tongue twisters. According to Webster’s New World Dictionary, a tongue twister is “a phrase that is hard to speak rapidly.” Do tongue twisters have an effect on the length of time it takes to read silently? To answer this question, 42 undergraduate psychology students participated in
Life expectancy of Oscar winners. Does winning an Academy of Motion Picture Arts and Sciences award lead to long-term mortality for movie actors? In an article in the Annals of Internal Medicine (May 15, 2001), researchers LO3 sampled 762 Academy Award winners and matched each one with another
Animal-assisted therapy for heart patients. Refer to the American Heart Association Conference (Nov. 2005) study to gauge whether animal-assisted therapy can improve the physiological responses of heart failure patients, presented in Exercise 2.112 (p. 106). Recall that a sample of n = 26 heart
Environmental impact study. Some power plants are located near rivers or oceans so that the available water can be used to cool the condensers. Suppose that, as part of an environmental impact study, a power company wants to estimate the difference in mean water temperature between the discharge of
The “winner’s curse” in auction bidding. In auction bidding, the “winner’s curse” is the phenomenon of the winning(or highest) bid price being above the expected value of the item being auctioned. The Review of Economics and Statistics (Aug. 2001) published a study on whether experience
Index of Biotic Integrity. The Ohio Environmental Protection Agency used the Index of Biotic Integrity (IBI)to measure the biological condition, or “health,” of an aquatic region. The IBI is the sum of metrics that measure the presence, abundance, and health of fish in the region.(Higher values
Racial profiling by the LAPD. Racial profiling is a term used to describe any police action that relies on ethnicity rather than behavior to target suspects engaged in criminal activities. Does the Los Angeles Police Department(LAPD) invoke racial profiling in stops and searches of Los Angeles
Executive workout dropouts. Refer to the Journal of Sport Behavior (2001) study of variety in exercise workouts, presented in Exercise 7.140 (p. 389). One group of 40 people varied their exercise routine in workouts, while a second group of 40 exercisers had no set schedule or regulations for their
Effect of altitude on climbers. Dr. Philip Lieberman, a neuroscientist at Brown University, conducted a field experiment to gauge the effect of high altitude on a person’s ability to think critically. The subjects of the experiment were five males who took part in an American expedition climbing
Rating service at five-star hotels. A study published in the Journal of American Academy of Business, Cambridge(Mar. 2002) examined whether the perception of the quality of service at five-star hotels in Jamaica differed by gender. Hotel guests were randomly selected from the lobby and restaurant
NHTSA new car crash tests. Refer to the National Highway Traffic Safety Administration (NHTSA) crash test data on new cars, saved in the CRASH file. Crash test dummies were placed in the driver’s seat and front passenger’s seat of a new car model, and the car was steered by remote control into
Treating depression with St. John’s wort. The Journal of the American Medical Association (Apr. 18, 2001) published a study of the effectiveness of using extracts of the herbal medicine St. John’s wort in treating major depression. In an eight-week randomized, controlled trial, 200 patients
A random sample of five pairs of observations was selected, one observation from a population with mean m1, the other from a population with mean m2. The data are shown in the following table.Pair Value from Population 1 LO3 Value from Population 2 1 28 22 2 31 27 3 24 20 4 30 27 5 22 20a. Test the
Two independent random samples are taken from two populations. The results of these samples are summarized in the following table.Sample 1 Sample 2 LO3 n1 = 148 n2 = 135 x1 = 15.2 x2 = 11.3 s21= 3.0 s22= 2.1a. Form a 90% confidence interval for 1m1 - m22.b. Test H0: 1m1 - m22 = 0 against Ha: 1m1 -
Independent random samples were selected from two binomial populations. The size and number of observed successes for each sample are shown in the following table.Sample 1 Sample 2 n1 = 200 n2 = 200 x1 = 70 x2 = 90a. Test H0: 1p1 - p22 = 0 against Ha: 1p1 - p22 6 0.Use a = .10. LO3b. Form a 95%
Independent random samples were selected from two normally distributed populations with means m1 and m2, respectively. The sample sizes, means, and variances are LO3 shown in the following table.Sample 1 Sample 2 n1 = 14 n2 = 12 x1 = 19.8 x2 = 17.3 s21 = 60.5 s22 = 74.2a. Test H0: 1m1 - m22 = 0
Two independent random samples were selected from normally distributed populations with means and variances LO3 1m1, s21 2 and 1m2, s22 2, respectively. The sample sizes, means, and variances are shown in the following table.Sample 1 Sample 2 n1 = 15 n2 = 20 x1 = 123 x2 = 116 s1 2= 15.65 s2 2=
For each of the following, identify the target parameter as m1 - m2, p1 - p2, or m.a. Comparison of average marks in statistics of male and female graduates.b. Difference between mean waiting times at two metro rail ticket counters.c. Comparison of proportions of Democrats and Republicans who favor
List the assumptions necessary for each of the following inferential techniques:a. Large-sample inferences about the difference 1m1 - m22 between population means, using a two-sample z-statisticb. Small-sample inferences about 1m1 - m22, using an independent samples design and a two-sample
Pentagon speeds up order-to-delivery times. Following the initial Persian Gulf War, the Pentagon changed its logistics processes to be more corporate-like. The extravagant“just-in-case” mentality was replaced with “just-intime”systems. Emulating Federal Express and United Parcel Service,
Shopping vehicle and judgment. Refer to the Journal of Marketing Research (Dec. 2011) study of shopping cart design, Exercise 9.21 (p. 478). Recall that design engineers want to know whether the mean choice of vice-over-virtue LO3 score is higher when a consumer’s arm is flexed (as when carrying
want to know if the variability in coughing improvement scores differs for the two groups. Conduct the appropriate analysis, using a = .10. If the preferred treatment is the one with the smallest variation in improvement scores, which treatment is preferable?Honey Dosage: 12 11 15 11 10 13 10 4 15
Is honey a cough remedy? Refer to the Archives of Pediatrics and Adolescent Medicine (Dec. 2007) study of honey as a children’s cough remedy, Exercise 2.40 (p. 79).The data (cough improvement scores) for the 33 children in the DM dosage group and the 35 children in the honey dosage LO3 group are

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