1.

A population of values has a normal distribution with ,u = 7.3 and o = 67. A random sample of size n = 63 is drawn. a. What is the mean of the distribution of sample means? I45 = ' b. What is the standard deviation of the distribution of sample means? Round your answer to two decimal places. 0'5=' A population of values has a normal distribution with u = 78.5 and o = 16.9. If a random sample of size n = 20 is selected, a. Find the probability that a single randomly selected value is less than 76.2. Round your answer to four decimals. P(X