Yoonie is a personnel manager in a large corporation. Each month she must review 12 of the employees. From past experience, she has found that the reviews take her approximately 4 hours each to do with a population standard deviation of 0.9 hours. Let X be the random variable representing the time it takes her to complete one review. Assume X is normally distributed. Let if be the random variable representing the mean time to complete the 12 reviews. Assume that the 12 reviews represent a random set of reviews. (a) What is the mean, standard deviation, and sample size? Mean 2 Number Standard Deviation = Number Sample Size = Number (b) Complete the distributions. Round all decimals to four decimal places. XN CIickforList v ( Number , Number ) X N CIickforList v ( Number , Number )