Question

Find the mean of the following data:
0-10
10-20
Class interval
20-30
30-40
40-50
16.
12
6
7
9
Frequency​

Answer 1

Step-by-step explanation:

Class Interval frequency (fi) Mid value

0-10 12 12 5

10-20 16 16 15

20-30 6 6 25

30-40 7 7 35

40-50 9 9 45

fixi

60

240

150

245

405

N=∑fi=50

∑fixi=1100

∴Mean= ∑fixi/∑fi= 1100/50 =22