CR13.16 The report of a European commission on radiation protection titled “Cosmic Radiation Exposure of Aircraft Crew” (2004) measured the exposure to radiation on eight international flights from Madrid using several different methods for measuring radiation. Data for two of the methods are given in the accompanying table. Use these data to test the hypothesis that there is no significant difference in mean radiation measurement for the two methods.

Flight Method 1 Method 2 1 27.5 34.4 2 41.3 38.6 3 3.5 3.5 4 24.3 21.9 5 27.0 24.4 6 17.7 21.4 7 12.0 11.8 8 20.9 24.1