Question

fing the size of clas interval 0-15,15-30 etc​

Answer 1

Upper limit of the first class = 15

Lower limit of the first class = 0

Class size = Upper limit - Lower limit = 15 - 0 = 15

Upper limit of the second class = 30

Lower limit of the second class = 15

Class size = Upper limit - Lower limit = 30 - 15 = 15

Answer:

The size of each class interval here is 15.

Answer 2

Answer:

class interval

10-20

20-30

30-40

40-50

50-60

10

12

7

7

8

3

(¡) for cumulative frequency

30-40 frequency is 7

(¡¡) size is 11

mid point for cumulative frequency

30-40 is 35

(¡¡¡) range = 70-10=60