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Question 143

The mean deviation of the observations 15, 17, 20, 23 and 25 about the arithmetic mean is

Solution

Solution:

The mean of given set is =$$\frac{\left(15+17+20+23+25\right)}{5}$$ = 20

mean deviation of the observations about the arithmetic mean = $$=\frac{\left(5+3+0+3+5\right)}{5}\ =\ \frac{16}{5\ }=3.2$$

3.2 Answer

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