We ask whether a new version of our textbook is beneficial or detrimental to students learning statistics. On a national statistics exam, µ = 68.5 for students using other textbooks. A sample of students using this book has the following scores:
64 69 92 77 71 99 82 74 69 88
(a) What are H0 and Ha for this study?
(b) Compute tobt.
(c) With a = .05, what is tcrit?
(d) What do you conclude about the use of this book?
(e) Compute the confidence interval for µ.