When we represent students' test performance in terms of standard scores, we must first know the standard deviation of those scores.This statistic tells us:
A)What the average student's performance was
B)How close together or far apart the scores are
C)Whether the test has high predictive validity
D)Whether the test has high reliability

Question

Quizplus · Accepted Answer

Standard deviation tells us how spread out the scores are from the average, which is represented by the mean. Therefore, it shows us how close together or far apart the scores are. It does not indicate the average student's performance, the test's predictive validity, or reliability.

When We Represent Students' Test Performance in Terms of Standard