3) Assume the grip strengths of premature menopausal women are normally distributed. The mean grip strength of premature menopausal women is 26.6 kg, and the standard deviation is 6.39 kg. Assume one premature menopausal woman is randomly selected. Find the probability that the grip strength of the premature menopausal woman is between 24 kg and 36 kg.

5)Sample size: You want to construct a 95% confidence interval for the mean of IQ scores. Assume the population standard deviation is 15. Also, you want the sample mean to be within 2 points margin of error of the population mean. How big does that sample need to be?