The index that allows a test user to compare two people's scores on a specific test to determine if the true scores are likely to be different is
A) the standard error of the mean.
B) the standard error of the difference.
C) the standard deviation.
D) the correlation coefficient.

Question

Quizplus · Accepted Answer

The index that allows a test user to compare two people's scores on a specific test to determine if the true scores are likely to be different is the standard error of the difference. This index takes into account both the standard deviations of the two tests being compared and the sample size of each test. The standard error of the mean (A) is used to determine the variability of a sample mean estimate. The standard deviation (C) is a measure of the variability of scores around the mean. The correlation coefficient (D) is used to determine the strength and direction of the relationship between two variables.

The Index That Allows a Test User to Compare Two