Tanner took a statistics test whose mean was 80 and standard deviation was 5.The total points possible was 100.Tanner's score was 2 standard deviations below the mean.What was Tanner's score,rounded to the nearest whole number?
A)78
B)70
C)90
D)None of these choices.

Question

Quizplus · Accepted Answer

Two standard deviations below the mean means his score is 2 * 5 = 10 points below the mean. Therefore, Tanner's score is 80 - 10 = 70.

Tanner Took a Statistics Test Whose Mean Was 80 and Standard