Homework 28 Problem 2 Previous Problem Problem List Next Problem 1 Point A Recent Poll Of 2000 Randomly Selected 18 2 1 (54.52 KiB) Viewed 16 times
Homework 28 Problem 2 Previous Problem Problem List Next Problem 1 Point A Recent Poll Of 2000 Randomly Selected 18 2 2 (57.07 KiB) Viewed 16 times
Homework 28: Problem 2 Previous Problem Problem List Next Problem (1 point) A recent poll of 2000 randomly selected 18-25- year-olds revealed that 232 currently use marijuana or hashish. According to a publication, 12.5% of 18-25- year-olds were current users of marijuana or hashish in 1997. Do the data provide sufficient evidence to conclude that the percentage of 18-25-year-olds who currently use marijuana or hashish has changed from the 1997 percentage of 12.5% ? Use a = 0.01 significance level. test statistic z = positive critical z score negative critical z score The final conclusion is A. There is not sufficient evidence to conclude that the percentage of 18-25-year-olds who currently use marijuana or hashish has changed from the 1997 percentage of 12.5%. OB. There is sufficient evidence to conclude that the percentage of 18-25-year-olds who currently use marijuana or hashish has changed from the 1997 percentage of 12.5%.
Homework 28: Problem 3 Previous Problem Problem List Next Problem (1 point) According to a recent marketing campaign, 110 drinkers of either Diet Coke or Diet Pepsi participated in a blind taste test to see which of the drinks was their favorite. In one Pepsi television commercial, an anouncer states that "in recent blind taste tests, more than one half of the surveyed preferred Diet Pepsi over Diet Coke." Suppose that out of those 110, 53 preferred Diet Pepsi. Test the hypothesis, using α = 0.05 that more than half of all participants will select Diet Pepsi in a blind taste test by giving the following: (a) the test statistic (b) the critical z score The final conclustion is A. We can reject the null hypothesis that p ≤ 0.5 and accept that p > 0.5. B. There is not sufficient evidence to reject the null hypothesis that p ≤ 0.5.
Join a community of subject matter experts. Register for FREE to view solutions, replies, and use search function. Request answer by replying!