According to the National Restaurant Association, hamburgers are the number one selling fast-food item in the United
Question:
According to the National Restaurant Association, hamburgers are the number one selling fast-food item in the United States (Newark Star-Ledger, Mar. 17, 1997). An economist studying the fast-food buying habits of Americans paid graduate students to stand outside two suburban McDonald's restaurants near Boston and ask departing customers whether they spent more or less than $2.25 on hamburger products for their lunch. Twenty answered "less than"; 50 said
"more than"; and 10 refused to answer the question.
a. Is there sufficient evidence to conclude that the median amount spent for hamburgers at lunch at McDonald's is less than $2.25?
b. Does your conclusion apply to all Americans who eat lunch at McDonald's? Justify your answer.
c. What assumptions must hold to ensure the validity of your test in part a?
Step by Step Answer:
Statistics For Business And Economics
ISBN: 9780130272935
8th Edition
Authors: James T. McClave, Terry Sincich, P. George Benson