The results of a search to find the least expensive round-trip flights to Atlanta and Salt Lake City from 14 major U.S. cities are shown in the following table. The departure date was June 20, 2012 and the return date was June 27, 2012. Click on the datafile logo to reference the data. a. Compute the mean price for a round-trip flight into Atlanta and the mean price for a round-trip flight.