Grocery store receipts show that customer purchases have a skewed distribution with a mean of $32 and a standard deviation $20.
a. Explain why you cannot determine the probability that the next customer will spend at least $40.
b. Estimate the probability that the next 50 customers will spend an average of at least $40.
c. Based on the answer in part (b), is it likely that the next 50 customers will spend an average of at least $40?