If a set of scores is normally distributed,then abo___ of the scores should fall within one standard deviation from the mean.
A)25%
B)half
C)2/3
D)95%

Question

Quizplus · Accepted Answer

According to the empirical rule or 68-95-99.7 rule of normal distribution, approximately 68% of the scores should fall within one standard deviation above and below the mean. This means that 2/3 or 66.67% of the scores fall within one standard deviation from the mean. Therefore, the best choice is C) 2/3.

If a Set of Scores Is Normally Distributed,then Abo___ of the Scores