Comparing proportions

In a previous exercise, we generated a binary response outcome in the Acupuncture dataset to indicate whether the percentage decrease from baseline in headache score at Month 12 is greater than 35%. Here we will test the null hypothesis that the group proportions for that binary outcome are equal to determine if there is a significant treatment effect on this binary endpoint.

We will also re-run the test with the tidy function. This will provide a simpler output. The broom library and Acupuncture dataset have been preloaded for this session.

Use the prop.test() function to compare the treatment.group proportions of resp35.month12.
Use the tidy() function (broom package) to store the results.
Display the treatment difference, i.e. the difference in proportions.

Take Hint (-30 XP)

Exercise

Comparing proportions

Instructions