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People often match their behavior to their social environment. One study of this idea first established that the type of music most preferred by black college students is R&B and that white college students' most preferred music is rock. Will students hosting a small group of other students choose music that matches the makeup of the people attending? Assign 9090 black business students at random to three equal‑sized groups. Do the same for 9696 white students. Each student sees a picture of the people he or she will host. Group 1 sees six blacks, Group 2 sees three whites and three blacks, and Group 3 sees six whites. Ask how likely the host is to play the type of music preferred by the other race. Use ANOVA to compare the three groups to see whether the racial mix of the gathering affects the choice of music.
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- One study of grand juries in Alameda County, California, compared the demographic characteristics of jurors with the general population, to see if the jury panels were representative.8 The results for age are shown below. The investigators wanted to know whether these 66 jurors were selected at random from the population of Alameda County. (Only persons 21 and over are considered; the county age distribution is known from Public Health Department data.) Fill out the last column below. All of your answers hould be accurate to the tenth digit, for example 4.8. The value of χ2 is [E]. Your answer should be an integer with no decimals. The degrees of freedom is [F]. Check that the p-value is essentially zero from the table. (True or False) With simple random sampling, it is almost impossible for a jury to differ this much from the county age distribution. The inference is that grand juries are not selected at random. Write true or false. [G]arrow_forwardA researcher wants to know if mood is affected by music. She conducts a test on a sample of 4 randomly selected adults and measures mood rating before and after being exposed to classic rock music. The following are the mood ratings for the four participants:arrow_forwardAn addictions researcher wants to see if male and female alcoholics differ in the type of alcohol they consume. She goes to a large alcohol detox facility, gets a sample of men and a sample of women, and checks each person's chart to find the beverage of choice. She classifies the beverages as (a) wine, (b) beer, or (c) hard liquor. She then figures out how many people of this sample of 66 people fall into each category. What type of test should she perform? Answer Choices: 2-way ANOVA chi-square test of independence correlation chi-square goodness of fit Imagine an elementary school teacher who is a follower of Carl Rogers and believes that unconditional positive regard leads to psychological health and positive behaviors. He obtains a random sample of 40 children from other teachers' classrooms at his school and, through home observation, he categorizes each child as receiving unconditional positive regard frequently, sometimes, or rarely. He then has each…arrow_forward
- a survey of 150 freshman business students at a local university produced the results listed below. how many students took only religion? 35 took history;42 took science;43 took religion;19 took history but not science;14 took science and religion;15 took history and religion;6 took all threearrow_forward3. A new radio station wants to know which type of music people in the area like the most. The station took a survey and displayed the results in a two-way frequency table. a. If the radio station wants to mainly play two of the categories, which two categories would result in the most listeners? Explain. b. Which two categories draw about the same number of women and men? Explain. Type of Music Pop Rock Jazz Country Alternative Total Survey Results Women 35 61 52 44 36 228 Gender Men 42 46 43 41 53 225 Total 77 107 95 85 89 453arrow_forwardSuppose 20% of cars are sportscars and that 30% of sportscars are red, and that 25% of all cars are red. What proportion of non-sportscars are red?arrow_forward
- Two hundred consumers were surveyed about a new brand of snack food, Crunchicles. Their age groups and preferences are given in the table.arrow_forwardA recent study examined the drinking behaviors of undergraduate college students (male and female freshmen). Each participant was asked how many alcoholic beverages they consumed during the past 7 days. The researchers wish to determine if there is a difference in the drinking habits of males and females in this age group. A recent study examined the drinking behaviors of undergraduate college students (male and female freshmen). Each participant was asked how many alcoholic beverages they consumed during the past 7 days. The researchers wish to determine if there is a difference in the drinking habits of male and females in this age group. Female Male 9 13 5 9 5 7 9 11 8 10 3 5 5 6 2 10 1 16 7 12 Which type of test will you run? What is the independent variable? What is the dependent variable?arrow_forwardA local blood center needs donors and has advertised on the college campus. Faculty, staff, and students all donated during the drive. Many also volunteered to help set up, hand out materials, and clean up at the end of the event. There were a total of 500 people surveyed about their involvement that day. Two hundred twenty-one of them gave blood. One hundred fifty-six helped with setting up and cleaning up, as well as handing out materials. If eighty-five people both helped and donated, find out how many people neither donated nor helped. There were respondents who neither donated nor helped. (Type a whole number.)arrow_forward
- The owners of an amusement park count the number of adults and children who attend the park on a Friday and Saturday. The completed table is shown below. Friday Saturday Total Adults 245 371 616 Children 154 277 431 Total 399 648 1,047 How does the joint frequency for the number of adults who attended the amusement park on Friday compare to the joint frequency for the number of children who attended the amusement park on Saturday? The joint frequency for the number of adults who attended the amusement park on Friday is 399, which is less than the joint frequency for the number of children who attended the amusement park on Saturday, 431. The joint frequency for the number of adults who attended the amusement park on Friday is 154, which is less than the joint frequency for the number of children who attended the amusement park on Saturday, 277. The joint frequency for the number of adults who attended the amusement park on Friday is 371, which is…arrow_forwardDr. A. Ventura is interested in determining what kinds and how many pets people own in Bakersfield. He stands outside Petco and asks people what kind of pet they own. This is the result of his survey: dog=1; cat=2; bird=3; reptile=4; fish=5; other=6 1,1,2,2,2,1,1,3,2,3,1,1,1,2,2,4,4,2,2,1,1,1,5,4,3,4,1,1,1,2,2,6,1,1,2,2,1,2,1,2,6,3,4,5arrow_forwardIndiana has a population of about 7 million people and Ohio about 12 million. Is it possible for there to be a poll where over 50% of Hoosiers say "yes", over 50% of Ohioans say "yes", but over 50% of all residents of both states say "no"? If no, explain why not. If yes, give an example of how that could happen.arrow_forward
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