a. The mean price for a round trip flight into Atlanta =
(340.10+321.60+291.60+339.60+359.60+384.60+309.60+415.60+293.60+249.60+539.60+455.60+359.60+333.90)/14 = $356.73
The mean price for a round trip flight into Atlanta = $356.73
The mean price for a round trip flight into Salt lake city = (570.1+354.6+465.6+219.6+311.6+297.6+471.6+618.4+513.6+523.2+381.6+159.6+267.6+458.6)/14
The mean price for a round trip flight into Salt lake city = $400.95