Yoonie is a personnel manager in a large corporation. Each month she must review 19 of the employees. From past experience, she has found that the reviews take her approximately 2.5 hours each to do with a population standard deviation of 1.3 hours. Let X be the random variable representing the time it takes her to complete one review. Assume X is normally distributed. Let I? be the random variable representing the mean time to complete the 19 reviews. Assume that the 19 reviews represent a random set of reviews. (a) What is the mean, standard deviation, and sample size? Mean 2 2.5 Standard Deviation = 1.3 Sample Size = 19 (b) Complete the distributions. Round all decimals to four decimal places