QSR magazine has been reporting on the largest quick-serve and fast-casual brands in the United States for nearly 15 years. The file QSR contains the food segment (burger, chicken, pizza, or sandwich) and U.S. average sales per unit ($thousands) for each of 58 quick-service brands. (Data extracted from bit.ly/Oj6EcY.)
a. At the 0.05 level of significance, is there evidence of a difference in the median U.S. average sales per unit ($thousands) among the food segments?
b. Compare the results of (a) with those of Problem 11.11 (a) on page 402.