Find the mean deviation about median
for the data 4, 6, 9, 3, 10, 13, 2
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Answer:
Arrange data in ascending order,
2,3,4,6,9,10,13
No. of observation n=7(odd)
Median =
2
n+1
=4
th
observation
Hence median =6
Now we calculate mean deviation about median, i.e;
⟹
7
∑∣x
i
−M∣
=
7
∣2−6∣+∣3−6∣+∣4−6∣+∣6−6∣+∣9−6∣+∣10−6∣+∣13−6∣
=
7
23
=3.28
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