A sample of 20 men have been asked to give their opinions on the use of electric razors before and after using a new kind of electric razor. The proper statistical test for examining the data is
A) the t-test of the difference between means.
B) the paired difference test.
C) analysis of variance.
D) regression analysis.
E) none of the above.

Question

Quizplus · Accepted Answer

The paired difference test (also known as the paired samples t-test or dependent samples t-test) is the appropriate statistical test for this scenario because it compares the means of two related groups to determine if there is a statistically significant difference between these means. In this case, the same group of men is being tested before and after using a new kind of electric razor, making their responses paired.

A Sample of 20 Men Have Been Asked to Give