McPhilly is conducting a study on the amount of money a customer spends on each visit to the restaurant. The company uses a computer to select customer receipts from each McPhilly restaurant. The company found that the mean amount spent is $11 with a $3 standard deviation. a. What type of sampling method was used?

b. What is the probability that a customer spend greater than $14 each visit?

c. What is the probability that a customer spends less than $7 each visit?

d. The customers were asked to respond to the following survey question, determine if the question is biased. Explain why or why not?

"What menu item gives you the best value?