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A random survey of the number of children of various age groups playing in park was found as follows:

Age (in years) Number of children
1-2 5
2-3 3
3-5 6
5-7 12
7-10 9
10-15 10
15-17 4

Draw a histogram to represent the data above.

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Here, it can be observed that the data has class intervals of varying width. The proportion of children per 1 year interval can be calculated as follows.

Age (in years) Frequency (Number of children0 Width of class Length of rectangle
1-2 5 1 5 x 1/1 = 5
2-3 3 1 3 x 1/1 = 3
3-5 6 2 6 x 1/2 =3
5-7 12 2 12 x 1/2 = 6
7-10 9 3 9 x 1/3 = 3
10-15 10 5 10 x 1/5 = 2
15-17 4 2 4 x 1/2 = 2

Taking the age of children on x-axis and proportion of children per 1 year interval on y-axis, the histogram can be drawn as follows.

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