1.A study is designed to investigate whether there is a difference in response to various treatments in patients with rheumatoid arthritis. The outcome is patient's self-reported effect of treatment. The data are shown below. Is there a significant difference in effect of treatment? Run the test at a 5% level of significance.
Symptoms
Worsened
No Effect
Symptoms Improved
Total
Treatment 1
22
14
14
50
Treatment 2
14
15
21
50
Critical value:
Computed statistic:
Based on comparing the computed statistics to the critical value which of the following is (are) true?
A. There is significant evidence, alpha =0.05, to show that there is a difference in the proportions of patients who show improvement between treatments 1 and 2
B. There is not a significance evidence, alpha=0.05, to show that there is a difference in the proportions of patients who show improvement between treatments 1 and 2
C. There is significant evidence, alpha=0.05 to show there is no difference in the proportions of patients who show improvement between treatments 1 and 2
D. A and c