Can students save money by comparison shopping at Amazon.com? To investigate this possibility, a random sample of 15 textbooks used during a recent semester at Miami University was selected. The prices for these textbooks at both a local bookstore and through Amazon.com were recorded. The prices for the textbooks, including all relevant taxes and shipping are as stated below. At the 0.01 level of significance, is there evidence of a difference in the median price of textbooks between the local bookstore and Amazon.com?
Book Name Book Store Amazon
Principles of Microeconomics 120.00 101.22
Calculus: Early Transcendentals 137.50 115.33
Exploring Wine 65.00 37.05
Manual de Gramatica 82.75 71.36
Deviant Behavior 90.00 83.00
Modern Architecture Since 1900 39.95 26.37
Rise of Christianity 40.00 26.40
Commercial Banking 120.00 108.99
A Romance of a Republic 25.00 14.99
Chemistry in Context 133.75 102.30
Universal Principles of Design 40.00 26.40
In Mixed Company 79.50 68.76
International Marketing 154.75 126.15
Russia & Western Civilization 30.95 31.95
Enterprise Information Systems 155.75 126.97