Scores at a local high school on the American College Testing (ACT) college entrance exam follow the normal distribution with a mean of 17 and a standard deviation of 9.A guidance counselor takes a random sample of 20 students and calculates the mean score

A.Calculate the mean and standard deviation of the sampling distribution of

B.Interpret the standard deviation from part (A).

C.Find the probability that a sample of 20 students has a mean score os 18.5 or more.