Question

Find the mean of the following frequency distribution by direct method.
Class-intervals
Frequency
0 - 10
5
10 - 20
8
20 - 30
12
30 – 40
7
40 – 50
6​

Answer 1

Answer:

65.6

Step-by-step explanation:

Class interval x

i

Frequency

(f

i

) f

i

x

i

10-30 20 5 100

30-50 40 8 320

50-70 60 12 720

70-90 80 20 1600

90-110 100 3 300

110-130 120 2 240

Σf

i

=50 Σf

i

x

i

=3280

mean=

Σf

i

Σf

i

x

i

=

50

3280

=65.6

Answer 2

Answer:

35.39

Step-by-step explanation:

I hope this is helpful to you.