Calculate the average workers in a factory using step deviation method.

40

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50

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60

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70

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Solution

The correct option is B $50$
Answer:-
Class interval width (i) = 25

Factory
X No. of workers
F $u = \frac{X - A}{i}$ Fu
25 10 -1 -10
50 = A 8 0 0
75 6 1 6
100 2 2 4
$Σ f = 26$ $Σ f u = 0$
By using step deviation method
Mean = $A + \frac{Σ f u}{Σ f} = 50 + \frac{0}{26} \times 25 = 50 + 0 = 50$
B) 50

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