A clinical trial is conducted comparing a new pain reliever for arthritis to a placebo.
A clinical trial is conducted comparing a new pain reliever for arthritis to a placebo. Participants are randomly assigned to receive the new treatment or a placebo and the outcome is pain relief within 30 minutes. The data are shown below.
| Pain Relief | No Pain Relief | |
| New Medication | 44 | 76 |
| Placebo | 21 | 99 |
Is there a significant difference in the proportions of patients reporting pain relief? Run the test at a 5% level of significance.
Reject H0 if Z < ________ or if Z > ________
alpha= ________
= ________
= ________
= ________
Z = ________
Based on comparing the computed z to the rejection level z which of the following is (are) true?
A. We have statistically significant evidence at .05 to show that H0 is false.
B. We have statistically significant evidence at .05 to show that there a significant difference in the proportions of patients reporting pain relief.
C. We do not have statistically significant evidence at .05 to show there a significant difference in the proportions of patients reporting pain relief.
D. a and b
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