Chow BBQ is a large restaurant chain. After paying for a meal at Chow BBQ, customers are asked to rate the quality of the food as a 1, 2, 3, 4, or 5, where a rating of 1 means "not good" and 5 means "excellent". The customers' ratings have a population mean of J -3.75, with a standard deviation of = 1.53. Suppose that we will take a random sample of 7 # 8 customers' ratings. Let x represent the sample mean of the 8 customers' ratings. Consider the sampling distribution of the sample mean x. Complete the following. Do not round any intermediate computations. Write your answers with two decimal places, rounding if needed. (a) Find J- (the mean of the sampling distribution of the sample mean). X (b) Find o- (the standard deviation of the sampling distribution of the sample mean). O_ X