Question

find mean by direct method


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Answer 1

Answer:

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

1-11 4 6 24

11-21 6 16 96

21-31 10 26 260

31-41 12 36 432

41-51 18 46 828

Σf

i

=50 Σf

i

x

i

=1640

∴mean=

Σf

i

Σf

i

x

i

=

50

1640

=32.8

Average distance covered by 50 persons = 32.8

B)32.8