Statistics Probability 2

Question

Assume that adults have IQ scores that are normally distributed, with a mean of 105 and a standard deviation of 17. Find the probability that a randomly selected individual has an IQ between 70 and 115.

Answer 1

The answer is 0.70206, obtained (to 5 decimal places) from the TI-83/84 DISTR menu's command

normalcdf(70,115,105,17)