Question

find the mean of given distribution
cI=0-5,5-10,10-15,15-20,20-25,25-30,30-35,35-40
frequency= 4,6,10,10,25,22,18,5​

Answer 1

Step-by-step explanation:

BY DIRECT METHOD

CI | f | x | fx

0-5 | 4 | 2.5 | 10

5-10 | 6 | 7.5 | 45

10-15 | 10 | 12.5 | 125

15-20 | 10 | 17.5 | 175

20-25 | 25 | 22.5 | 562.5

25-30 | 22 | 27.5 | 605

30-35 | 18 | 32.5 | 585

35-40 | 5 | 37.5 | 187.5

∑ f= 100 ∑ fx=2295

therefore, mean=

$\frac{∑ fx}{∑ f } = \frac{2295}{100}$

=22.95