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Please find below the solution to the asked query:
We form table for mean by step deviation method :
And
We know formula of mean by step deviation method :
, So
Mean = 36 ( Ans )
Hope this information will clear your doubts about Statistics .
If you have any more doubts just ask here on the forum and our experts will try to help you out as soon as possible.
Regards
Please find below the solution to the asked query:
We form table for mean by step deviation method :
Wage Rate | Wage Rate | Mid point ( xi ) | No. of Workers ( f i) | ui = Here h = 10 | fi ui |
Less than 10 | 0 - 10 | 5 | 3 | - 4 | - 12 |
Less than 20 | 10 - 20 | 15 | 10 - 3 = 7 | - 3 | - 21 |
Less than 30 | 20 - 30 | 25 | 18 - 10 = 8 | - 2 | - 16 |
Less than 40 | 30 - 40 | 35 | 30 - 18 = 12 | - 1 | - 12 |
Less than 50 | 40 - 50 | 45 = a | 39 - 30 = 9 | 0 | 0 |
Less than 60 | 50 - 60 | 55 | 45 - 39 = 6 | 1 | 6 |
Less than 70 | 60 - 70 | 65 | 50 - 45 = 5 | 2 | 10 |
= 50 | = -45 |
And
We know formula of mean by step deviation method :
, So
Mean = 36 ( Ans )
Hope this information will clear your doubts about Statistics .
If you have any more doubts just ask here on the forum and our experts will try to help you out as soon as possible.
Regards