OR Before After 22.00 15.66 The data given shows the time to prep an operating room, before and after a training session was given. 23.81 14.27 The following hypotheses were formulated for this study: A W NH 20.53 16.17 21.58 19.27 Ho: The OR prep times after training are equal to or greater than before training. 19.77 20.12 The OR times after training are less than before training. 28.71 17.31 18.00 21.24 23.38 25.83 1) What was the mean prep time before training? 24.16 19.28 10 21.29 13.57 2) What is the mean prep time after training? 11 24.33 23.60 12 20.99 24.51 3) The variances between the two time periods are [Select all that apply] 13 30.74 28.76 a. Equal 14 16.63 7.68 b. Unequal 15 24.45 22.31 c. Not relevant to the selection of t-test for this problem 16 24.04 18.64 17 25.62 22.12 4) What is the test statistic (t stat)? 18 18.46 15.03 19 27.78 21.45 5) What is the appropriate t (critical value)? 20 17.83 15.74 6) Should you accept or reject the null hypothesis? IL 7) Was training successful? Justify your