Well this one got me...

Grand Sun Buffet is a large restaurant chain. After paying for a meal at Grand Sun Buffet, 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 p=4.57, with a standard deviation of 6: 1.82. Suppose that we will take a random sample of n= 7 customers' ratings. Let ; represent the sample mean of the 7 customers' ratings. Consider the sampling distribution of the sample mean ;. Complete the following. Do not round any intermediate computations. Write your answers with two decimal places, rounding if needed. (a) Find 11; (the mean of the sampling distribution of the sample mean). u;=[ X b ? (b) Find a; (the standard deviation of the sampling distribution of the sample mean). c=|] x s '9 x