The following distribution gives the number of accidents met by 160 wo – InterviewSolution

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1.

The following distribution gives the number of accidents met by 160 workers in a factory during a month. No. of accidents (x):01234 No. of workers (f):70523431Find the average number of accidents per worker.

Answer»

Let the assumed mean (A) = 2

No. of accidents (xi)	No. of workers (f_i)	u_i = x_i - A = x_i - 2	f_iu_i
0	70	-2	-140
1	52	-1	-52
2	34	0	0
3	3	1	3
4	1	2	2
	N = 160		\(\sum\)f_iu_i = -187

Average number of accidents per day workers = A + \(\frac{\sum f_iu_i}{N}\)

\(=2+(-\frac{187}{160})=\frac{320-187}{160}\)

\(=0.83\)

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