The effectiveness of a headache medicine is tested by measuring the intensity of a headache in patients before and after drug treatment. The data consist of before and after intensities for each patient.
Identify the design of the study.
A) Paired t-test
B) Two-sample t-test
C) one sample t-test of a mean
D) one sample z-test of a proportion
B?
Yes, the correct design of the study is B) Two-sample t-test.
In this study, the effectiveness of a headache medicine is being tested by comparing the intensity of headaches in the patients before and after drug treatment. The data consists of before and after intensities for each patient.
A two-sample t-test is appropriate because we have two independent groups (before and after treatment) and we want to compare the means of the two populations to determine if there is a significant difference between the two intensities.