Which statistic is appropriate for use to estimating the heterogeneity of a test composed of multiple-choice items?
A) point-biserial correlation coefficient
B) Pearson-product moment correlation coefficient
C) coefficient alpha
D) chi square

Question

Quizplus · Accepted Answer

Coefficient alpha (also known as Cronbach's alpha) measures the internal consistency of a test composed of multiple-choice items, providing a good estimate of the heterogeneity of the test. It ranges from 0 to 1, with higher values indicating greater reliability and consistency of the test scores. The other options (point-biserial correlation coefficient, Pearson-product moment correlation coefficient, and chi square) are not appropriate for estimating the heterogeneity of a multiple-choice test.

Which Statistic Is Appropriate for Use to Estimating the Heterogeneity