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?