Find the mean deviation about the mean for the data.

x_i

5

10

15

20

25

f_i

7

4

6

3

5

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Solution

x_i

f_i

f_i x_i

5

7

35

9

63

10

4

40

4

16

15

6

90

1

6

20

3

60

6

18

25

5

125

11

55

25

350

158

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