A researcher would like to test the effect of a new diet drug on the activity level of animals. A sample of n = 16 rats is obtained and each rat's activity level is measured on an exercise wheel for one hour prior to receiving the drug. Thirty minutes after receiving the drug, each rat is again tested on the activity wheel. The data show that the rats increased their activity by an average of MD = 21 revolutions with 55 = 6000 after receiving the drug. Do these data indicate that the drug had a significant effect on activity. Use a two-tailed test with Oi = .05. a. Using symbols, state the hypotheses for this test. b. Locate the critical region for a = .05. c. Compute the t statistic for these data. (And type out and label the numbers that you calculated to reach this answer.) d. What decision should the researcher make about the null hypothesis m what should the researcher conclude about the new diet drug on activity level? e. Calculate the 95% CIUDiff