T-scores have an effective range of
A) plus or minus 3 standard deviations
B) plus or minus 2 standard deviations
C) plus or minus 30 points
D) both a and c

Question

Quizplus · Accepted Answer

T-scores are standardized scores with a mean of 50 and a standard deviation of 10. The effective range of T-scores typically covers plus or minus 3 standard deviations from the mean, which translates to a range of plus or minus 30 points from the mean score of 50.

T-Scores Have an Effective Range of