Mathematics

Efrain Hawkins

4 January, 11:11

Rin incorrectly calculated the mean absolute deviation for the data set 25,25,31,36,38. Her work is shown here. 1. Find the mean. Mean = 25 + 25 + 31 + 36 + 38 5 = 155 5 = 31 2. Find each absolute deviation. Absolute deviations:6,6,0,5,7 3. Find the mean absolute deviation. MAD = 6 + 0 + 5 + 7 4 = 18 4 = 4.5 In which step did Rin make an error?

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