More groceries Suppose the store in Exercise 14 had 312 customers this Sunday. a) Estimate the probability that the store’s revenues were at least $10,000. b) If, on a typical Sunday, the store...

More groceries Suppose the store in Exercise 14 had 312 customers this Sunday.

a) Estimate the probability that the store’s revenues were at least $10,000.

b) If, on a typical Sunday, the store serves 312 customers, how much does the store take in on the worst 10% of such days?

Exercise 14

Groceries A grocery store’s receipts show that Sunday customer purchases have a skewed distribution with a mean of $32 and a standard deviation of $20.

a) Explain why you cannot determine the probability that the next Sunday customer will spend at least $40.

b) Can you estimate the probability that the next 10 Sunday customers will spend an average of at least $40? Explain.

c) Is it likely that the next 50 Sunday customers will spend an average of at least $40? Explain.