The required information needed in order to compute KR-21 includes
A) number of items on the test, mean score, and median score.
B) number of items on the test, mean score, and standard deviation.
C) mean score, standard deviation, median score.
D) mean score, reliability coefficient, and standard deviation.

Question

Quizplus · Accepted Answer

KR-21 requires the number of items on the test and the standard deviation of the scores. The mean score is not necessary for computing KR-21, and the median score and reliability coefficient are not used in this calculation.

The Required Information Needed in Order to Compute KR-21 Includes