A recently released dvd is sold at three different local establishments: a music store, a book store, and a discount store. a sample of dvd prices at each establishment can be taken to give an indicat

A recently released dvd is sold at three different local establishments: a music store, a book store, and a discount store. a sample of dvd prices at each establishment can be taken to give an indication of the true average dvd price. the question is whether the true average dvd price differs from store to store. open the file lab7_data.xls. you can adjust the true means and sample sizes at each of the three stores. use these controls in answering the fo