Page 8 - Lesson note-3-Ch 14 Statistics Graphical Representation

Example- 8.

The following table shows the number of illiterate persons in the age group (10 –
58 years) in a town:

Age group (in years Number of illiterate
persons
10 - 16 175
17 - 23 325
24 - 30 100
31 - 27 150
38 - 44 250
45 - 51 400
52 - 58 525

Draw a histogram to represent the above data.
Solution:
Convert the given inclusive form into an exclusive form by taking intervals as given
below:
Age group (in years)
Age group Number of
(in years) illiterate persons

9.5 – 16.5 175
16.5 – 23.5 325
23.5 – 30.5 100
30.5 – 37.5 150
37.5 – 44.5 250
44.5 – 51.5 400
51.5 – 58.5 525

Consider the class intervals that is age group in years on the X – axis and number of
illiterate persons on the Y-axis and draw rectangles which provides the required
histogram.
A break is indicated near the origin on the X axis since the scale starts at 9.5.