study was conducted in which students were asked to estimate the number of calories in a cheeseburger. One group was asked to do this sher Thinking about orie-laden cheesecake. A second group was asked to do this after thinking about an organic fruit salad. The mean number of calories ought about the organic fruit salad. Suppose that the study was based on a sample of 20 students in each group, and the standard deviation of the number of calories estimated was 120 for the people who ought about the cheesecake first and 145 for the people who thought about salad first. Complete parts (a) through (e). State the null and alternative hypotheses if you want to determ per is lower for the people who thought about the cheesecake first than for the people who thought about the organic fruit salad first. at jus represent the mean number of calories estin ed by the people who thought about the organic fruit salad first. Choose the correct answer bello A. Ho: 1 2 Pa C. Ho:Hi Spa OD. HOP, "Pa Hyt Hy >Pa aning of a Type I emer? A. A Type I error 3. A Type I emo D. A Type I error is c In the conbe A. A Type II error is B. A Type II error is co cake when it is not significantly lower C. A D. A Type II error is co .Assume the population varian lower for the per ganic fruit salad first? ind the test statistic. STAT "Found to two decimal places as needs ind the p-value. value =(Round to three decimal to the conclusion of the test. Hy There A psychologist now informs us that these 2 groups ais that the 2 groups have equal mean numbers of estimated calories? star " (Round to three decimal places as needed) Test the given claim. Identify the null hypothesis, alternative hypothesis. live hypothesis, test statistic, P.va at statistic, P.value, and then state the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. Among 2025 passenger cars in a particular region, 230 had only rear license plates. s, is the population proportion of passenger cars that ONLY have rear licence plates. Among 309 commercial trucks, 51 had only rear license plates. zo is the population proportion of trucks that ONLY have rear licence plates. A reasonable hypothesis is that commercial trucks owners violate laws requiring front license plates at a higher rate than owners of passenger cars. Use a 0.01 significance level to test that hypothesis. a. Identity the null and alterna theses for this test. Let population 1 comes success be a vehicle that only has a rear license plate OA HORSE2 OB. HO: " 2 OD. Ho: #1 2 Identify the test statistic. (Round to two decimal places as n identity the P.value. (Round to three decimal places State the con O A. Fail to reject Ho. There is no O B. Reject Ho. There is no O G. Fail to reject Ho. There O D. Reject Ho- There assanger cars. b. Suppose that the 0.01 significance level were replaced by a w.001 . Is it correct to say that the pro Hypothesis has decreased? HINT: The process is you collect a random s O False This decrease O True
