Xr02-46 In 2004, the total number of prescriptions sold in the United States was 3,274,000,000 (Source:

National Association of Drug Store Chains). The sales manager of a chain of drugstores wanted to determine whether changes were made in the way the prescriptions were filled. A survey of prescriptions was undertaken in 1995, 2000, and 2007. The year and type of each prescription were recorded using the codes below. Determine whether there are differences between the years. (Source: Adapted from the Statistical Abstract of the United States, 2009, Table 151.)

1. Traditional chain store 2. Independent drugstore 3. Mass merchant 4. Supermarket 5. Mail order