using direct method calculate the mean of the mean of the following distribution
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Answer:
Using direct method
Representing the data into frequency distribution table
x
i
=mid point of each class interval
Class interval No. of workers
(f
i
) x
i
f
i
x
i
0-5 4 2.5 10
5-10 5 7.5 37.5
10-15 6 12.5 75
15-20 7 17.5 122.5
20-25 8 22.5 180
Σf
i
=30 Σf
i
x
i
=425
∴mean=
Σf
i
Σf
i
x
i
=
30
425
=14.16
B)14.16
Step-by-step explanation:
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