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Using the data shown below, suppose we focus on the proportions of patients who show improvement. Is there a statistically significant difference in the proportions of patients who show improvement between treatments 1 and 2. Run the test at a 5% level of significance. Make sure to 1. give the null and alternative hypotheses, 2. calculate the test statistic, and 3. give the conclusion (including a comparison to alpha or the critical value) to receive full credit.
Symptoms Improved
No
Yes
Total
Treatment 1
36
14
50
Treatment 2
29
21
Give a 95% confidence interval for the mean of the population from which the sample is drawn.
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