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Statistics Plus New Mylab Statistics With Pearson Etext Access Card Package 13th Edition James Mcclave ,Terry Sincich - Solutions
Does saving money lead to happiness? Does this relationship hold for all countries? Using the WVS dataset, run a regression equation using HAPPY as the dependent variable and three independent variables: SAVING, COUNTRY2CAT, and the interaction between these two variables.Describe your results by
Some think life is most stressful during middle age, when people have the most obligations (their own child and their own parents). Use the PewSocialMedia dataset, first selecting cases so that you’re analyzing only respondents aged 45 to 69. Then, run a regression with the Index of Upsettedness
Use the PewSocialMedia dataset to run a regression with the variable “# of times/ week use Facebook” as your dependent variable. Select cases so that you’re looking only at respondents aged 50 or younger. For your independent variables, use the “Concern about Being Left Out” index, the
Use the PewSocialMedia dataset to run a regression with the Index of Social Media Use as your dependent variable. For your independent variables, use the recoded sex variable (XYsex), the age variable, and the interaction between the two. Calculate appropriate examples, draw a graph, and explain
Use the PewWorkPlay dataset to run a regression with the recoded income variable (XYincome) as your dependent variable. For your independent variables, use the recoded education variable (XYeduc), the recoded disability variable (XYdisability), and the interaction between these two variables.
Use the PewWorkPlay dataset to run a regression with the “Use of Social Media for Job Search” index as your dependent variable. For your independent variables, use age, the recoded sex variable (XYsex), and the interaction between these two variables. Calculate appropriate examples, draw a
Use the PewWorkPlay dataset to run a regression with the “Video Game Attitude” index as your dependent variable. For your independent variables, use age, the recoded sex variable (XYsex), and the interaction between these two variables. Calculate appropriate examples, draw a graph, and explain
A child’s age likely has an effect on the number of ways he or she uses social networking websites, but is this effect the same for boys and girls?Investigate this using the PewKids dataset (use the Child’s Social Networking Uses Index). Create a table of your results as well as a graph and
Perhaps gender—of both the checker and the checkee—plays a role in the extent to which a parent checks and blocks the technology of his or her child. Use the PewKids dataset to run a regression model that uses the Child’s Perception of Parental Checking & Blocking Behavior as the dependent
Using the PewHealth dataset, address this question: does age have the same effect on men and women with regard to cell phone use? Use the Cellphone Use Index as your dependent variable, and recoded sex, age, and the interaction between the two as your independent variables. Create a table of your
Using the PewHealth dataset, address this question: does education have the same effect on men and women with regard to seeking out health information on the Internet? Use the Internet Health Use Index as your dependent variable, and recoded sex, recoded education, and the interaction between the
Using the PewHealth dataset, address this question: as they age, do whites and blacks develop health conditions at the same rate? Use the Health Conditions Index as your dependent variable, and age, race (white/black), and the interaction between the two as your independent variables. Create a
Do political views and income interact in interesting ways with regard to how people feel about income inequality? Run a regression using the ANES Income Inequality Concern Index as your dependent variable. As your independent variables, use the recoded political views variable, family income in
There’s a good chance that men and women may have different attitudes toward women working. But does how much men and women work affect these attitudes as well, and does this effect differ for men and women?Using the ANES Women Working Index, run a regression using the recoded sex variable, the
Does religiosity have the same effect on attitudes toward feminism for women as it does for men? Use the ANES feminist feeling thermometer as the dependent variable. For the independent variable use the recoded sex variable, the recoded religious attendance variable, and the interaction between the
Whites and blacks typically have different ideas about the importance of working toward equality. People’s incomes also affect how they feel about equality: those with higher incomes care a bit less about equality. But does income affect attitudes towards equality the same for whites and
There is a huge wealth gap between whites and blacks. Even blacks who have high incomes have, for a variety of reasons, difficulty building wealth.Investigate this by creating an interaction model with the ANES Ownership Index as the dependent variable. For the independent variables, use race(the
how researchers used interactions to study work-related guilt
how researchers used interactions to study the effects of a school arts program
interaction effects between two ratio-level variables
interaction effects involving reference groups
interaction effects between two dichotomies
interaction effects between a dichotomy and a ratio-level variable
how interaction and elaborated crosstabs are related
which research questions lead us to looking at interaction effects
Web-based exercise. You can find the report of the National Institute of Environmental Health Sciences (NIEHS) on the possible health effects of exposure to power lines at www.niehs.nih.gov/health/topics/agents/emf/. Visit the site. Although the few studies that have been conducted on adult
Web-based exercise. All of the sample surveys mentioned in Examples 4 to 7 maintain Web sites:• Gallup Poll (Example 4): www.gallup.com/• Current Population Survey (Example 5): www.bls.gov/cps/• Nielsen Media Research (Example 6):www.nielsenmedia.com/nc/portal/site/Public/• General Social
Choose your study purpose. Give an example of a question about college students, their behavior, or their opinions that would best be answered by(a) a sample survey.(b) an observational study that is not a sample survey.(c) an experiment.AppendixLO1
Choose your study type. What is the best way to answer each of the questions below: an experiment, a sample survey, or an observational study that is not a sample survey? Explain your choices.(a) Is your school’s football team called for fewer penalties in home games than in away games?(b) Do
The cost of textbooks. A student is interested in determining if the cost of a textbook depends on the number of pages. The student goes to the campus bookstore, picks a textbook rack at random, and records the number of pages and price of each textbook on the rack. What is the population in this
Physical fitness and leadership. A study of the relationship between physical fitness and leadership uses as subjects middle-aged executives who have volunteered for an exercise program. The executives are divided into a low-fitness group and a high-fitness group on the basis of a physical
Oatmeal and cholesterol. Does eating oatmeal reduce the level of bad cholesterol (LDL)? Here are two ways to study this question.1. A researcher finds 500 adults over 40 who regularly eat oatmeal or products made from oatmeal. She matches each with a similar adult who does not regularly eat oatmeal
Treating prostate disease. A large study used records from Canada’s national health care system to compare the effectiveness of two ways to treat prostate disease. The two treatments are traditional surgery and a new method that does not require surgery. The records described many patients whose
Power lines and leukemia. The study of power lines and leukemia in Example 3 compared two groups of individuals and measured many variables that might influence differences between the groups. Explain carefully why this study is not an experiment.AppendixLO1
Teens sleep needs. A Washington Post article reported on a study about the the sleep needs of teenagers. In the study, researchers measured the presence of the sleep-promoting hormone melatonin in teenagers’ saliva at different times of the day. They learned that the melatonin levels rise later
What is the population? For each of the following sampling situations, identify the population as exactly as possible. That is, say what kind of individuals the population consists of and say exactly which individuals fall in the population. If the information given is not sufficient, complete the
What is the population? For each of the following sampling situations, identify the population as exactly as possible. That is, say what kind of individuals the population consists of and say exactly which individuals fall in the population. If the information given is not sufficient, complete the
The political gender gap. There may be a “gender gap” in political party preference in the United States, with women more likely than men to prefer Democratic candidates. A political scientist interviews a large sample of registered voters, both men and women. She asks each voter whether he or
The death penalty. A press release by the Gallup News Service says that, based on a poll conducted October 4–7, 2007, it found that 69% of Americans respond “Yes” when asked this question: “Are you in favor of the death penalty for a person convicted of murder?” Toward the end of the
Sampling moms. Pregnant and breast-feeding women should eat at least 12 ounces of fish and seafood per week to ensure their babies’ optimal brain development, according to a coalition of top scientists from private groups and federal agencies. A nutritionist wants to know whether pregnant women
Who recycles? In Example 1, weight is not a good measure of the participation of households in different neighborhoods in a city recycling program.What variables would you measure in its place?AppendixLO1
Athletes’ salaries. Here is a small part of a data set that describes Major League Baseball players as of opening day of the 2007 season:Player Team Position Age Salary...Taveras, Willy Rockies Outfield 25 402 Beckett, Josh Red Sox Pitcher 27 6,667 Sabathia, C. C. Indians Pitcher 26 8,750
Miles per gallon. Here is a small part of a data set that describes the fuel economy (in miles per gallon) of 2008 model motor vehicles:Make and Vehicle Transmission Number of City Highway model type type cylinders mpg mpg...BMW 328ci Subcompact car Automatic 6 19 28 BMW 325ci Subcompact car Manual
Posting lectures on the class Web site. To determine what students found most helpful, an educational researcher examined student comments from several classes he taught. Mentioned most often was the fact that copies of lectures were posted on the classWeb site for students to download. The
Federal funding. The University of Pennsylvania’s National Annenberg Election Survey conducted a poll from July 30 to August 5, 2004. They asked:Do you favor or oppose Federal funding of research on diseases like Alzheimer’s using stem cells taken from human embryos?The National Annenberg
Oil spill impact on seabirds. Refer to the Journal of Agricultural, Biological, and Environmental Statistics(Sept. 2000) study of the impact of a tanker oil spill on the seabird population in Alaska, presented in Exercise 2.205 (p. 138). Recall that for each of 96 shoreline locations(called
Detection of rigged school milk prices. Each year, the state of Kentucky invites bids from dairies to supply half-pint containers of fluid milk products for its school districts. In several school districts in northern Kentucky (called the “tri-county” market), two suppliers—Meyer Dairy and
Last name and acquisition timing. Refer to the Journal of Consumer Research (Aug. 2011) study of the last name effect in acquisition timing, Exercise 9.14 (p. 476). Recall that the mean response times (in minutes) to acquire basketball tickets were compared for two groups of MBA students: LO3 those
Minority students in engineering. Figure 11.11 is a histogram of the number of minority students (black, Hispanic, Native American) who earned doctorate degrees in engineering from each of 152 universities in the years 2000 through 2002. Briefly describe the shape, center, and spread of this
Outliers. The African elephant is much larger than any other mammal in the data set but lies roughly in the overall straight-line pattern. Dolphins, humans, and hippos lie outside the overall pattern. The correlation between body weight and brain weight for the entire data set is r = 0.86.(a) If we
Never on Sunday? The Canadian province of Ontario carries out statistical studies to monitor how Canada’s national health care system is working in the province. The bar graphs in Figure II.4 come from a study of admissions and discharges from community hospitals in Ontario. They show the number
We pay high interest. Figure 10.12 shows a graph taken from an advertisement for an investment that promises to pay a higher interest rate than bank accounts and other competing investments. Is this graph a correct comparison of the four interest rates? Explain your answer. T 6% 4% 2% 3.5% 4.4%)
We sell CDs. Who sold the most CDs on the Web just before listeners began to download their favorites rather than buy CDs? Figure 10.13 graphs the shares of the market leaders in 1997 and says what percentage of all online sales they had. Does the graph fairly represent the data? Explain your
The cost of tomatoes. Figure 10.14 is a line graph of the average cost of tomatoes each month from January 1997 to December 2007. These data, from the Bureau of Labor Statistics’ monthly survey of retail prices, are the price in dollars and cents per pound.(a) The graph shows strong seasonal
Exports. Figure 10.15 compares the value of exports (in billions of dollars)in 2002 from the world’s leading exporters: Germany, Japan, and the United States.(a) Explain why this is not an accurate graph.(b) Make an accurate graph to compare the exports of these nations.Figure 10.15 Value of
A bad graph? Figure 10.16 shows a graph that appeared in the Lexington (Ky.) Herald-Leader on October 5, 1975. Discuss the correctness of this graph. 0 1 U.S. Dollars $4.86 DECLINE OF BRITISH POUND 4 $4.03 3 $2.80 $2.60 $2.40 2 $2.03 1925 1939 1949 1967 1971 1975 Copyright 1975 by the Associated
Trucks versus cars. Consumers are turning to trucks, SUVs, and minivans in place of passenger cars. Here are data on sales of new cars and trucks in the United States. (The definition of “truck” includes SUVs and minivans.)Plot two line graphs on the same axes to compare the change in car and
Who sells cars? Figure 10.18 is a pie chart of the percentage of passenger car sales in 1997 by various manufacturers. The artist has tried to make the graph attractive by using the wheel of a car for the “pie.” Is the graph still a correct display of the data? Explain your answer. General
Lightning storms. Figure 11.9 comes from a study of lightning storms in Colorado. It shows the distribution of the hour of the day during which the firstlightning flash for that day occurred. Describe the shape, center, and spread of this distribution. Are there any outliers? 25 25 20 20 15 Count
Refer to Exercises 10.23 and 10.24. Complete the following ANOVA table for each of the two dot plots: Source Treatments Error Total df SS MS F
A partially completed ANOVA table for a completely randomized design is shown here:a. Complete the ANOVA table.b. How many treatments are involved in the experiment?c. Do the data provide sufficient evidence to indicate a difference among the population means? Test, using a = .10.d. Find the
The data in the following table resulted from an experiment that utilized a completely randomized design:a. Use statistical software (or the formulas in Appendix B)to complete the following ANOVA table:b. Test the null hypothesis that m1 = m2 = m3, where mi represents the true mean for treatment i,
Does the media influence your attitude toward tanning?Dermatologists’ primary recommendation to prevent skin cancer is minimal exposure to the sun. Yet models used in product advertisements are typically well-tanned. Do such advertisements influence a consumer’s attitude toward tanning?
Evaluation of flexography printing plates. Flexography is a printing process used in the packaging industry. The process is popular because it is cost-effective and can be used to print on a variety of surfaces (e.g., paperboard, foil, and plastic). A study was conducted to determine if flexography
Soil scouring and overturned trees. Trees that grow in flood plains are susceptible to overturning. This is typically due to floodwaters exposing the tree roots(called soil scouring). Environmental engineers at Saitama University (Japan) investigated the impact of soil scouring on the
Study of recall of TV commercials. Do TV shows with violence and sex impair memory for commercials? To answer this question, researchers conducted a designed experiment in which 324 adults were randomly assigned to one of three viewer groups of 108 participants each(Journal of Applied Psychology,
Improving driving performance while fatigued. Can a secondary task—such as a word association task—improve your performance when driving while fatigued?This was the question of interest in a Human Factors(May 2014) study. The researchers used a driving simulator to obtain their data. Each of 40
Effects of temperature on ethanol production. A lowcost and highly productive bio-fuel production method is high-temperature fermentation. However, heat stress can inhibit the amount of ethanol produced during the process.In Engineering Life Sciences (Mar. 2013), biochemical engineers carried out a
Restoring self-control when intoxicated. Does coffee or some other form of stimulation really allow a person suffering from alcohol intoxication to “sober up”? Psychologists investigated the matter in Experimental and Clinical Psychopharmacology (Feb. 2005). A sample of 44 healthy male college
Is honey a cough remedy? Pediatric researchers carried out a designed study to test whether a teaspoon of honey before bed calms a child’s cough and published their results in Archives of Pediatrics and Adolescent Medicine (Dec. 2007).(This experiment was first described in Exercise 2.40, p.
The “name game.” Psychologists evaluated three methods of name retrieval in a controlled setting (Journal of Experimental Psychology—Applied, June 2000). A sample of 139 students was randomly divided into three groups, and each group of students used a different method to learn the names of
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 76 heart patients were
Whales entangled in fishing gear. Refer to the Marine Mammal Science (April 2010) investigation of whales entangled by fishing gear, Exercise 10.32(p. 552). The mean body lengths (meters) of whales entangled in each of the three types of fishing gear (set nets, pots, and gill nets) are reported
Does the media influence your attitude toward tanning?Refer to the Basic and Applied Social Psychology (May 2010) study of whether product advertisements influence consumers’ attitudes toward tanning, Exercise 10.33(p. 552).Recall that college students were randomly assigned to one of three
Evaluation of flexography printing plates. Refer to the Journal of Graphic Engineering and Design (Vol. 3, 2012)study of the quality of flexography printing, Exercise 10.34(p. 552). Recall that four different exposure times were studied—8, 10, 12, and 14 minutes—and that the measure of print
Chemical properties of whole wheat breads. Whole wheat breads contain a high amount of phytic acid, which tends to lower the absorption of nutrient minerals. The Journal of Agricultural and Food Chemistry (Jan. 2005) published the results of a study to determine whether sourdough can increase the
Robots trained to behave like ants. Refer to the Nature(Aug. 2000) study of robots trained to behave like ants, presented in Exercise 10.35(p. 553). Multiple comparisons of mean energy expended for the four colony sizes were conducted with an experimentwise error rate of .05. The results are
Guilt in decision making. The effect of guilt emotion on how a decision maker focuses on the problem was investigated in the Journal of Behavioral Decision Making(Jan. 2007). A sample of 77 volunteer students participated in one portion of the experiment, where each was randomly assigned to one of
Study of recall of TV commercials. Refer to the Journal of Applied Psychology (June 2002) completely randomized design study to compare the mean commercial recall scores of viewers of three TV programs, presented in Exercise 10.37(p. 553). Recall that one program had a violent content code (V)
Baking properties of pizza cheese. Due to its unique stretchability, mozzarella is the most commonly used pizza cheese. How do the baking properties of mozzarella compare with those of other pizza cheese options? This was the question of interest in a study published in the Journal of Food Science
Writing styles in medical journals. When publishing research results, most medical journals advise authors to write using the “active” rather than the “passive” voice.The impact of the use of the passive voice in five top medical journals with differing writing style guidelines was
Effect of scopolamine on memory. The drug scopolamine is often used as a sedative to induce sleep in patients. In Behavioral Neuroscience (Feb. 2004), medical researchers examined scopolamine’s effects on memory with associated word pairs. A total of 28 human subjects, were given a list of
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 10.43(p. 555). You found evidence of a difference among
A randomized block design yielded the ANOVA table shown here:a. How many blocks and treatments were used in this experiment?b. How many observations were collected in the experiment?c. Specify the null and alternative hypotheses you would use to compare the treatment means.d. What test statistic
An experiment was conducted that used a randomized block design. The data from the experiment are displayed in the following table.a. Fill in the missing entries in the following ANOVA table:b. Specify the null and alternative hypotheses you would use to investigate whether a difference exists
A randomized block design was used to compare the mean responses for three treatments. Four blocks of three homogeneous experimental units were selected, and each treatment was randomly assigned to one experimental unit within each block. The data are shown in the following table, and a MINITAB
Solar energy generation along highways. The potential of solar panels on roofs built above national highways as a source of solar energy was investigated in the International Journal of Energy and Environmental Engineering (Dec. 2013). Computer simulation was used to estimate the monthly solar
“Topsy-turvy” seasons in college football. Each week during the college football season the Associated Press(AP) ranks the top 25 Division I college football teams based on voting by sportswriters. Many recent upsets of top-rated teams have led to major changes in the weekly AP Poll over the
Treatment for tendon pain. Refer to the British Journal of Sports Medicine (Feb. 1, 2004) study of chronic Achilles tendon pain, presented in Exercise 10.12(p. 538). Recall that each in a sample of 25 patients with chronic Achilles tendinosis was treated with heavy-load eccentric calf muscle
Interactive video games and physical fitness. Wii Fit is an interactive video game marketed to consumers who want to increase their physical fitness level. The effectiveness of Wii Fit activities relative to other physical activities was investigated in the Journal of Physical Activity and Health
Evaluating health care research reports. When evaluating research reports in health care, a popular tool is the Assessment of Multiple Systematic Reviews (AMSTAR).AMSTAR, which incorporates 11 items (questions), has been widely accepted by professional health associations. A group of dental
Stress in cows prior to slaughter. What is the level of stress(if any) that cows undergo prior to being slaughtered?To answer this question, researchers designed an experiment involving cows bred in Normandy, France (Applied Animal Behaviour Science, June 2010). The heart rate(beats per minute) of
Taste-testing scales. When comparing the palatability of food items, numerical taste test scales are employed. For example, the Hedonic 9-point scale uses the following ratings:1 = dislike extremely, 2 = dislike very much, 3 =dislike moderately, 4 = dislike slightly, 5 = neither like nor dislike, 6
Irrelevant facial similarity effects on judgment. Facial similarity to previously encountered persons can be a potential source of bias in decision making. For example, in a job interview, the interviewer should judge the job candidate solely on his/her qualifications, not on whether the candidate
Effect of massage on boxers. Eight amateur boxers participated in an experiment to investigate the effect of massage on boxing performance (British Journal of Sports Medicine, Apr. 2000). The punching power of each boxer (measured in newtons) was recorded in the round following each of four
Listening ability of infants. Science (Jan. 1, 1999) reported on the ability of seven-month-old infants to learn an unfamiliar language. In one experiment, 16 infants were trained in an artificial language. Then each infant was presented with two 3-word sentences that consisted entirely of new
The partially complete ANOVA table given here is for a two-factor factorial experiment:a. Give the number of levels for each factor.b. How many observations were collected for each factor–level combination?c. Complete the ANOVA table.d. Test to determine whether the treatment means differ.Use a =
Following is a partially completed ANOVA table for a 3 * 4 factorial experiment with two replications:a. Complete the ANOVA table.b. Which sums of squares are combined to find the sum of squares for treatment? Do the data provide sufficient evidence to indicate that the treatment means differ?Use a
The following two-way table gives data for a 2 * 3 factorial experiment with two observations for each factor–level combination.a. Identify the treatments for this experiment. Calculate and plot the treatment means, using the response variable as the y-axis and the levels of factor B as the
The following two-way table gives data for a 2 * 2 factorial experiment with two observations per factor–level combination:a. Identify the treatments for this experiment. Calculate and plot the treatment means, using the response variable as the y-axis and the levels of factor B as the x-axis.
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