What percentage of scores should fall between -1 SD and +1 SD from the mean?
A) 34%
B) 68%
C) 50%
D) none of these

Name: What percentage of scores should fall between -1 SD and +1 SD from the mean? A) 34% B) 68% C) 50% D) none of these
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Question

Quizplus · Accepted Answer

68% of scores fall between -1 SD and +1 SD from the mean because the normal distribution is a bell-shaped curve, and 68% of the area under the curve falls within one standard deviation of the mean.

What Percentage of Scores Should Fall Between -1 SD and +1