A student scores one standard deviation below the mean, and when converted to a standard score that student's score is 85 (SD = 15). What would that student's score be using a T score?
A) 15
B) 35
C) 40
D) 85

Question

Quizplus · Accepted Answer

To convert a standard score to a T score, you simply multiply the standard score by 10 and add 50. In this case, the student's standard score of 85 becomes a T score of (85 x 10) + 50 = 850 + 50 = 900. Dividing by 20 (the standard deviation for a T score) gives a T score of 45, which corresponds to a score of 40 (since T scores are rounded to the nearest whole number). Therefore, the answer is choice C.

A Student Scores One Standard Deviation Below the Mean, and When