Given a 50 item multiple-choice test with a mean of 30, standard deviation of 4, and a reliability coefficient of .84, calculate the Standard Error of Measurement.
A) 2.60
B) 1.80
C) -2.40
D) 1.60

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 reliability coefficient. Plugging in the given values: SEM = 4 * sqrt(1 - 0.84) = 4 * sqrt(0.16) = 4 * 0.4 = 1.60.

Given a 50 Item Multiple-Choice Test with a Mean of 30