We ask whether a new version of a textbook impacts students learning of statistics. On a national statistic exam students using the old textbook score 68.5. A sample of students using the new textbook have the following scores: 64 69 92 77 71 82 74 69 88 What are the Ho and Ha for this study? Compute tobt and with .05 what is the tcrit? What do you conclude about the use of this book? Compute the confidence interval for u.