The mean and SD for a test are 80 and 10, respectively. The test-retest reliability is .84. The standard error of measurement (SEM) is ___.

Question

Quizplus · Accepted Answer

The standard error of measurement (SEM) is calculated using the formula SEM = SD * sqrt(1 - reliability), where SD is the standard deviation and reliability is the test-retest reliability. Plugging in the given values, SEM = 10 * sqrt(1 - 0.84) = 10 * sqrt(0.16) = 10 * 0.4 = 4.

The Mean and SD for a Test Are 80 and 10