In a normal distribution of IQ scores,what percentage of people have a score between 70 and 130?
A) 54%
B) 68.26%
C) 95.44%
D) 99.9%

Question

Quizplus · Accepted Answer

In a normal distribution, approximately 68% of the population falls within one standard deviation of the mean, approximately 95% falls within two standard deviations, and approximately 99.7% falls within three standard deviations. Since the average IQ score is 100 with a standard deviation of 15, a score between 70 and 130 falls within two standard deviations of the mean. Therefore, approximately 95.44% of people have a score between 70 and 130.

In a Normal Distribution of IQ Scores,what Percentage of People