Premium Online Home Tutors
3 Tutor System
Starting just at 265/hour

A random survey of the number of children of various age groups playing in a park was found as follows :
Age (in years)No. of children (frequency)
1 - 25
2 - 33
3 - 56
5 - 712
7 - 109
10 - 1510
15 - 174

Draw a histogram to represent the data above.


Answer :

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)No. of children (frequency)Width of classLength of rectangle
1 - 251\(\frac{5 × 1}{1} = 5\)
2 - 331\(\frac{3 × 1}{1} = 3\)
3 - 562\(\frac{6 × 1}{2} = 3\)
5 - 7122\(\frac{12 × 1}{2} = 6\)
7 - 1093\(\frac{9 × 1}{3} = 3\)
10 - 15105\(\frac{10 × 1}{5} = 2\)
15 - 1742\(\frac{4 × 1}{2} = 2\)


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

image

NCERT solutions of related questions for Statistics

NCERT solutions of related chapters class 9 maths

NCERT solutions of related chapters class 9 science