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The weekly wages of 120 workers in a fac...

The weekly wages of 120 workers in a factory are shown in the following frequency distribution table. Find the mean of the weekly wages.
(Use Step deviation method)

Text Solution

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The correct Answer is:
The mean of the weekly wages is Rs. 4250.

Here, `Sigma f_(i) u_(i) = - 45, Sigma f_(i) = 120 , g = 2000`
(the GCD of 4000, 2000 and 2000)
`bar u = (Sigma f_(i) u_(i))/(Sigmaf_(i))` ...(Formula)
` = ( - 45)/(120) = - 0.375`
Mean ` barX = A + baru g`
` = 5000 + (-0.375) xx 2000`
` = 5000 - 750 = 4250`
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