Assignment 11 Ch. 11: One Sample t-test Solve the following: 1. We ask whether a new version of our textbook is beneficial or detrimental to students learning statistics. On a national statistics exam, [1268.5 for students using other textbooks. A sample of students using the new textbook has the following scores: 64 69 92 77 71 99 82 74 69 88 a) State the Hand Ha_ b) Compute tobt c) With 0L=.05, what is tcm? d) What do you conclude about the use of this book? e) Compute the confidence interval for #- 2. A scientist suspects that as a person's stress level changes, so does the amount of his or her impulse buying. With N=62, r = .38. a) What are the Ho and Hafor this study? b) What conclusions should he draw? C) What other calculations should be performed to describe the relationship in these data? 12