Men’s weights are normally distributed with mean 170 pounds and standard deviation 20 pounds. A sample of 25 men are randomly selected.?
a. What is the mean of the sample means?
b. What is the standard deviation of the sample means?
c. What is the probability that the sample mean weight is greater than 175?
d. To get the answers for part (c), what technology did you use? If an online applet was used, please list the URL. If a calculator or Excel was used, please write out the function.