Question

calculate the
mean for
the
following distribution c-i.0-10-10-20-20-30-30-40-40-50 frequency.6-9-15-9-1​

Answer 1

Answer:

estion 1:

Find the mean, using direct method:

Class0-1010-2020-3030-4040-50Frequency35953

ANSWER:

Class

Frequency (fi)

Mid Values (xi)

(fi×xi)

0-10

3

5

15

10-20

5

15

75

20-30

9

25

225

30-40

5

35

175

40-50

3

45

135

 

∑fi=25

 

∑(fi×xi)=625

 

∴ Mean, ˉx=∑(fi×xi)∑fi=62525=25∴ˉx=25