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