Question

Prepare a continuous grouped frequency distribution from the following data:

Mid - Point Frequency

5

15

25

35

45

4

8

13

12

6

Also, find the size of class intervals.​

Answer 1

Answer:

We know that , if m is the midpoint fo a class and h is the class size,

then lower limit of class interval =m−

2

h

Upper limit of class interval =m+

2

h

We have class sixe, 15−5=10

so the class interval formed from the midpoint 5 is

=(5−

2

10

)−(5+

2

10

)i.e0−10

Containing in the same manner, the continuous classes formed are;

solution

please see img