McPhilly is conducting a study on the amount of money a customer spends on each visit to the restaurant. The company uses the receipts from 1 McPhilly to conduct the study. The company found that the mean amount spent is $11 with a $3 standard deviation.a.

a. What type of sampling method was used?

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

c. What is the probability that a customer spends more 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?

How does our food compare to PhillyBurger?