If we wish to compare the before-and-after reading speeds of individual participants in a speed-reading course,the z-test for comparing the means of two independent samples is appropriate.

Question

Quizplus · Accepted Answer

The correct test for comparing the before-and-after reading speeds of individual participants in a speed-reading course is a paired t-test, not a z-test for independent samples, because the same participants are measured twice, making the samples dependent, not independent.

If We Wish to Compare the Before-And-After Reading Speeds of Individual