Chapter 7, Question 7.1: Given a normal distribution with =100 and o=10, if you select a sample of n=25, what is the probability that X is: a. Less than 95 b. Between 95 and 97.5 c. Above 102.2 d. There is a 65% chance that X is above what value? Chapter 7, Question 7.5: The diameter of a brand of tennis balls is approximately normally distributed, with a mean of 2.63 and a standard deviation of 0.03 inch. If you select a random sample of nine tennis balls a. What is the sampling distribution of the mean? b. What is the probability that the sample mean is less than 2.61 inches? c. What is the probability that the sample mean is between 2.62 and 2.64 inches