________ percent of the population has IQ scores between 70 and 130.
A) Sixty-five
B) Seventy-five
C) Ninety-five
D) Eighty-five

Question

Quizplus · Accepted Answer

The IQ scale is set up so that the average IQ is 100, with a standard deviation of 15. This means that approximately 68% of the population has an IQ between 85 and 115, approximately 95% has an IQ between 70 and 130, and approximately 99.7% has an IQ between 55 and 145. Therefore, choice C is the best answer.

________ Percent of the Population Has IQ Scores Between 70