For a variable that is normally distributed with a mean of 60 and a standard deviation of 10, approximately ______ of the scores are between ______ and ______.
A) 95%; 40 and 80
B) 95%; 50 and 70
C) 68%; 40 and 80
D) 99%; 40 and 80

Question

Quizplus · Accepted Answer

The 95% range for a normally distributed variable is approximately mean ± 2 standard deviations. Here, 60 ± 2(10) = 40 to 80.

For a Variable That Is Normally Distributed with a Mean