Do college students tend to gain or lose weight during their freshman year? Following are a sample of weights of 15 college freshmen at the beginning and at the end of their freshman year.

Can you conclude that the median weight at the end of the year differs from the median at the beginning of the year? Use the a = 0.05 level of significance.

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Beginning 74 150 148 0 6 162 186 18 158 118 12489 103 149 17 End Student 1 2 3 4 56 7 10 11 12 13 14 15 193 6 53 94 53 172 177 73 64 139 204 15 143 127