Question

question 9
a health researcher was interested in finding out whether the dash diet can lower a dieters blood pressure. researchers compared the blood pressure before going on the diet with the same subjects blood pressure after 12 weeks on the dash diet.
which of the following is the most appropriate statistical test to use to test whether the dash diet lowers blood pressure?
a. inference for regression
b. chi - squared test for independence
c. anova
d. matched pairs t - test
e. two - sample t - test

Explanation:

Step1: Identify data type

The data consists of before - and after - measurements on the same subjects.

Step2: Recall statistical tests

Matched pairs t - test is used for paired data (same subjects measured twice).

Answer:

D. Matched pairs t - test