Question

Assume that adults have IQ scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 15. a. Find the percentage of adults that have an IQ between 87 and 113. b. Find the percentage of adults that have an IQ exceeding 120. c. Determine the first quartile for adult IQs. d. Obtain the 95th percentile for the IQ of adults. a. The percentage of adults that have an IQ between 87 and 113 is nothing​%. ​(Type an integer or decimal rounded to two decimal places as​ needed.) b. The percentage of adults that have an IQ exceeding 120 is nothing​%. ​(Type an integer or decimal rounded to two decimal places as​ needed.) c. The first quartile is nothing. ​(Type an integer or decimal rounded to two decimal places as​ needed.) d. The 95th percentile is nothing. ​(Type an integer or decimal rounded to two decimal places as​ needed.)

Answer 1