If the mean score on a creativity test is 20,the standard deviation is 5,and the distribution is normal,the percentage of people who would obtain scores between 15 and 25 is
A)34%
B)14% + 34% = 48%
C)50%
D)34% + 34% = 68%

Question

Quizplus · Accepted Answer

We can use the empirical rule to estimate the percentage of people who would obtain scores between 15 and 25. According to the empirical rule, approximately 68% of the scores fall within one standard deviation of the mean in a normal distribution.

So, the percentage of people who would obtain scores between 15 and 25 is approximately 34% on each side of the mean (i.e., 20 - 5 = 15 and 20 + 5 = 25).

Therefore, the best choice is D, which is 34% + 34% = 68%.

If the Mean Score on a Creativity Test Is 20,the