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- Under what circumstances is it advisable to switch to a between-subjects design instead of using a within-subjects design? On the other hand, when is it advantageous to use a within subjects design instead of a between subjects design? Use examples in which you really would have the option of using either design, not situations in which only one of these designs is possible.A Pew Research study conducted in 2017 found that approximately 75% of Americans believe that robots and computers might one day do many of the jobs currently done by people.† Suppose we have the following data collected from nurses, tax auditors, and fast-food workers in which a higher score means the person feels his or her job is more likely to be automated. Nurse TaxAuditor Fast-FoodWorker 3 4 5 4 5 8 6 4 6 2 4 8 3 6 5 3 3 6 4 5 6 5 3 4 (a) Use ? = 0.05 to test for differences in the belief that a person's job is likely to be automated for the three professions. State the null and alternative hypotheses. H0: μNurse = μTax auditor = μFast-food worker Ha: μNurse ≠ μTax auditor ≠ μFast-food worker H0: At least two of the population means are equal. Ha: At least two of the population means are different. H0: Not all the population means are equal. Ha: μNurse = μTax auditor = μFast-food worker H0: μNurse = μTax auditor = μFast-food worker Ha:…A consulting firm that surveyed consumers’ holiday shopping behavior found that the percentage of consumers from the US, Canada, and China who said that they planned to spend more on holiday shopping were 40%, 34% and 73%, respectively The survey also found that the percentage of consumers from the US, Canada, and China who said that they were willing to share personal information with retailers in order to receive personalized offers from retailers were 55%, 46% and 72%, respectively Assume that there are equal portions of consumers being surveyed from each of the three countries, the survey results are good representations of the three populations of consumers, and whether a consumer plans to spend more on holiday shopping is statistically independent of whether he/she is willing to share personal information with retailers in order to receive personalized offers from retailers If you randomly select a consumer from the US, what is the probability that the consumer plans to…
- A Pew Research study conducted in 2017 found that approximately 75% of Americans believe that robots and computers might one day do many of the jobs currently done by people.† Suppose we have the following data collected from nurses, tax auditors, and fast-food workers in which a higher score means the person feels his or her job is more likely to be automated. Nurse TaxAuditor Fast-FoodWorker 4 4 5 4 5 8 5 6 6 2 3 8 2 6 5 3 3 6 4 5 5 6 2 5 (a)Use ? = 0.05 to test for differences in the belief that a person's job is likely to be automated for the three professions. State the null and alternative hypotheses. 1. H0: μNurse = μTax auditor = μFast-food worker Ha: Not all the population means are equal. 2. H0: Not all the population means are equal. Ha: μNurse = μTax auditor = μFast-food worker 3. H0: At least two of the population means are equal. Ha: At least two of the population means are different. 4. H0: μNurse ≠ μTax auditor ≠ μFast-food worker…In Jolie’s new Thai restaurant, she observes the age of her customers and notes down which of the groups they belong to – ’18 years old and below’ or ‘above 18 years old’, and whether they spent more than $30 on a single meal - ‘big spender’ or ‘non-big spender’. Given that rate (big spender | above 18 years old) > rate (big spender | 18 years old and below), what conclusion can be made? a) Being a big spender and being above 18 years old are negatively associated.b) Being a big spender and being above 18 years old are positively associated.c) Being above 18 years old is positively associated with visiting her restaurant.d) Being above 18 years old causes one to become a big spender.Under what circumstances is it advisable to switch to a between-subjects design instead of using a within-subjects design?
- If gender is the independent variable of a quasi-experiment, this experiment must have a between-subject design. Group of answer choices True FalseThe term “spotlight effect” refers to overestimating the extent to which others notice your appearance or behavior, especially when you commit a social faux pas. Effectively, you feel as if you are suddenly standing in a spotlight with everyone looking. In one demonstration of this phenomenon, Gilovich, Medvec, and Savitsky (2000) asked college students to put on a Barry Manilow T-shirt that fellow students had previously judged to be embarrassing. The participants were then led into a room in which other students were already participating in an experiment. After a few minutes, the participant was led back out of the room and was allowed to remove the shirt. Later, each participant was asked to estimate how many people in the room had noticed the shirt. The individuals who were in the room were also asked whether they noticed the shirt. In the study, the participants significantly overestimated the actual number of people who had noticed. In a similar study using a sample of n = 9…Based on a survey of 12,344 U.S. college students and 6,729 Canadian college students, Kuo, Adlaf, Lee, Gliksman, Demers, and Wechsler (2002) report that alcohol use is more common among Canadian than U.S. students, but heavy drinking (five or more drinks in a row for males, four or more for females) is significantly higher among U.S. students than Canadian students. Is this an example of a survey research design?
- A company institutes an exercise break for its workers to see if it will improve job satisfaction, as measured by a questionnaire that assesses workers' satisfaction before and after the implementation of the program. Using an appropriate nonparametric procedure and α=0.05, does the data indicate that that an exercise break for the workers improved job satisfaction? Worker Number 1 2 3 4 5 6 7 8 9 10Before 36 28 30 46 26 26 24 16 15 28After 33 36 49 41 36 40 39 21 20 37 1. Using the Normal approximation, find the value of the test statistic. 2 .Find the P-value for the test statistic. 3. Choose the correct conclusion below. A. The after exercise program job satisfaction scores are systematically higher when compared to the before exercise program job satisfaction scores. B. The after exercise program job satisfaction scores seem to be systematically equal when compared to the…Major league baseball did not have any black players until Jackie Robinson broke the color line in 1947, even though there was no doubt that black athletes had the requisite playing skills. Was this most likely to be indicative of employer, employee, consumer, or statistical discrimination?Do ethnic group and gender influence the type of care that a heart patient receives? The following pas- sage is from the article “Heart Care Reflects Race and Sex, Not Symptoms” (USA Today, February 25, 1999, reprinted with permission):Previous research suggested blacks and women were less likely than whites and men to get cardiac cathe- terization or coronary bypass surgery for chest pain or a heart attack. Scientists blamed differences in illness severity, insurance coverage, patient preference, and health care access. The researchers eliminated those differences by videotaping actors—two black men, two black women, two white men, and two white women—describing chest pain from identical scripts. They wore identical gowns, used identical gestures, and were taped from the same position. Researchers asked 720 primary care doctors at meetings of the American College of Physicians or the American Academy of Family Physicians to watch a tape and recommend care. The doctors thought the…