Using the values 2, 4, 7, 8 and 9, calculate the mean deviation from the median.

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Q. Using the values 2, 4, 7, 8 and 9, calculate the mean deviation from the median.

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Median $= 7$ , $\sum |d| = 11$ , so $M.D. = \dfrac{11}{5} = 2.2$ .

Step 1 — Median. Arranged in order the values are 2, 4, 7, 8, 9, so the middle (3rd) value is the median: Median $= 7$ .

Step 2 — Absolute deviations from the median.

Step 3 — Mean deviation from the median. …

Q.Using the values 2, 4, 7, 8 and 9, calculate the mean deviation from the median.