Suppose a researcher wished to determine whether sales had improved since a recent promotions campaign by comparing the sales averages before and after the campaign to evaluate its effectiveness. Which of the following statistical tests would you suggest?
A) One-sample t-test
B) Independent samples t-test
C) Paired-samples t-test
D) ANOVA

Question

Quizplus · Accepted Answer

The paired-samples t-test would be the best choice as it compares the means of two related samples (in this case, sales before and after the promotions campaign) by evaluating the differences between each pair of observations. This test is appropriate when the measurement of interest is continuous and the samples are dependent (i.e. each observation in one sample is paired with an observation in the other sample).

Suppose a Researcher Wished to Determine Whether Sales Had Improved