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Question

Find the mean using step deviation method.
453153.png

A
14
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B
13
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C
12
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D
10
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Solution

The correct option is D 10

x

Mid-point

(frequency)

di=xi6

ui=xi64

fiui

0-4

2

1

-4

-1

-1

4-8

6 (a)

2

0

0

0

8-12

10

3

4

1

3

12-16

14

4

8

2

8

10

fiui=10=10

Mean =a+fiuifi×h=6+1010×4=10Ans

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