Question

question 14 (1 point)
what test do we use if we want to compare the effectiveness of two different pain
killers?
question 15 (1 point)
paired sample t - test
independent samples t - test
one sample t - test
more information is needed to determine which t - test to use

Explanation:

The independent samples t - test is used to compare the means of two independent groups. In this case, we are comparing the effectiveness of two different pain - killers (two independent groups).

Answer:

independent samples t - test