A study was conducted to determine the effectiveness of a certain treatment. A group of 102 patients were randomly divided into an experimental group and a control group. The table shows the K esult for their net improvement. Let the experimental group be group 1 and the control group be group 2. Click the icon to view the net improvement results. C.. (a) Test whether the experimental group experienced a larger mean improvement than the control group at the a = 0.01 level of significance. State the null and alternative hypotheses. Choose the correct answer below. O A. Ho: My = H2 and H1: Hy > H2 O B. Ho: My = 12 and H1: My # 12 O C. Ho: My = 12 and H1: Hy

11 O B. Ho: H # 11 versus Ha: M= 11 O C. Ho: H = 11 versus Ha: H # 11 The test statistic for this small-sample test of a population mean is. (Round to two decimal places as needed.) Find the rejection region. Choose the correct answer below. O A. t 2.779 O B. t> - 2.779 and t 2.779 State the appropriate conclusion for the test. Choose the correct answer below. 31 There is insufficient evidence to reject Ho. O There is sufficient evidence to reject Ho- on 32 tion 33 Time Remaining: 02:07:29 Next 44 DII DD F9 888 F6 F7 FB F3 FA delet % O @ $ 6 2 O P R T