4 Solved Questions on the Hypothesis Testing - Exam | MA 120, Exams of Probability and Statistics

Download 4 Solved Questions on the Hypothesis Testing - Exam | MA 120 and more Exams Probability and Statistics in PDF only on Docsity! MA 120 - section E. Lee Exercise 4 Printed Name:(Last, First) Show all your work to get credit. Box your answer. 1. A brochure inviting subscription for a new diet program states that the participants are expected to lose over 22 pounds in five weeks. Suppose that, from the data of the five-week weight losses of 56 participants, the sample mean and standard deviation are found to be 23.5 and 10.2 pounds, respectively. Could the statement in the brochure be substantiated on the basis of these findings? (a) Test with α = .05. (b) Test with α = .15. (c) Calculate the p−value and interpret the result. MA 120 - section E. Lee Exercise 4 2. A sample of 80 measurements was taken to test the null hypothesis that the population mean equals 1100 against the alternative that it is different from 1100. The sample mean and standard deviation were found to be 1060 and 210, respectively. (a) Perform the hypothesis test at the 1% level of significance. (b) Calculate the p-value and interpret the result. Page 2