Write the class -size in each of the following:

Solution:

(1) 0 - 4, 5 - 9, 10 - 14

True class limits are 0.5 - 4.5, 4.5 - 9.5, 9.5 - 14.5

Therefore class size = 14.5 - 9.5 = 5

(2) 10 - 19, 20 - 29, 30 - 39

True class limitsà 19.5 - 19.5, 19.5 - 29.5, 29.5 - 29.5

Class size = 39.5 - 29.5 = 10

(3) 100 - 120, 120 - 140, 160 -180

Here the class limits and true class limits are the same

Therefore class size = 120 - 100 = 20

(4) 0 - 0.25, 0.25 - 00.50, 0.50 - 0.75

Here the class limits and true class limits are the same

Therefore class size = 0.25 – 0 = 0.25

(5) 5 - 5.01, 5.01 - 5.02, 5.02 - 5.03.

Here the class limits and true class limits are the same

Therefore class size = 5.01 - 5.0 = 0.01.