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A frequency distribution of funds collec...

A frequency distribution of funds collected by 120 workers in a company for the drought affected people are given in the following table.
Find the mean of the funds by 'step deviation' method.

Text Solution

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The correct Answer is:
The mean fo the funds is Rs. `987.50`.

Here, `Sigmaf_(i)u_(i) = - 63, Sigmaf_(i) = 120, g = 500`
`baru = (Sigmaf_(i)u_(i))/(Sigmaf_(i)) = (-63)/(120) = - 0.525`
Mean ` barX = A + baru g`
` = 1250 + (-0.525) xx 500`
` = 1250 - 262.50 = 987.50`
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