Question

If in a frequency distribution the overlapping class intervals are of equal size and the class marks of consecutive intervals are as given below then determine the class intervals.
(a) 10, 20, 30, 40
(b) 5.5, 10.5, 15.5, 20.5, 25.5​

Answer 1

Answer:

If the class intervals of a frequency distribution be

16-25-26-35,36-45-46-55 then

determine

(a) the class limits and class boundaries of the class 36-45,

(b) the class size and the class mark of the class interval 26-35,

(c) the class intervals when changed into overlapping class interval.

hope it was helpful

Answer 2

Answer:

Solution

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(a)

Lower class limit of the interval 36 - 45 = 36 and

Upper class limit of the interval 36 - 45 = 45

(b)

Class Size of the interval 26 - 35 = 10 and

Class Mark of the interval 26 - 35 = 30 (Class Mark is the average of the limits of the class interval)

(c)

The class intervals when changed into overlapping class intervals are

15.5 - 25.5

25.5 - 35.5

35.5 - 45.5

45.5 - 55.5