Question

find mean,median and mod of
X=15,20,25,30,35,40,45
F=2,3,4,6,10,5,2​

Answer 1

Answer:

Size of the item f

10−15 4

15−20 8

20−25 18

25−30 30

30−35 20

35−40 10

40−45 5

45−50 2

Modal class is 25−30 since it has the maximum frequency.

Lower limit of the modal class l=25

Frequency of the modal class f=30

Frequency of the preceding modal class f

1

=18

Frequency of the class reducing the modal class f

2

=20