Use the following information to answer Questions 9 -14. A small pilot study is
ID: 3223193 • Letter: U
Question
Use the following information to answer Questions 9 -14. A small pilot study is run to compare a new drug for chronic pain to one that is currently available. Participants are randomly assigned to receive either the new drug or the currently available drug and report improvement in pain on a 5-point ordinal scale 1 = Pain is much worse. 2 = Pain is slightly worse, 3 = No change. 4 = Pain improved slightly. 5 = Pain much improved. Use the Mann-Whitney U test to determine if the new drug is significantly better in improvement in pain with a 5% level of significance (i.e. one-sided). What is the critical value? a. 8 b. 9 c. 10 d. 11 Define Group 1 to be those who received the New Drug What is R_2? a. 37 b. 13.5 c. 68 d. 7.5 Define Group 2 to be those who received the Standard Drug. What is R_2? a. 68 b. 37 c. 11 d. 1.5 What is U_1? a. 49 b. 28 c. 37 d. 9 What is U_2? a. 40 b. 49 c. 28 d. 37 True or False: Reject the null hypothesis as the test statistic is less than the critical value.Explanation / Answer
9. Option (d) is correct choice.
Answer is 11.
10. Option (c) is correct choice.
Answer is 68.
11. Option (b) is correct choice.
Answer is 37.
12. Option (d) is correct choice.
Answer is 9.
13. Option (a) is correct choice.
Answer is 40.
14. TRUE