Question

Draw a histogram to represent the following frequency distribution.

Class interval	Frequency
10- 19	7
20-29	10
30-39	20
40-49	5
50-59	15

Answer 1

The given distribution is in the inclusive form. 

d = lower limit of a class – upper limit of a class before it = 20 – 19 

d = 1 , \(\frac{d}{2}\) = \(\frac{1}{2}\) = 0.5

Stated class interval	Actual class	Frequency
10- 19	9.5 – 19.5	7
20-29	19.5-29.5	10
30-39	29.5 – 3u9.5	20
40-49	39.5 -49.5	5       .
50-59	49.5 – 59.5	15