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Question
Draw a histogram for the following distribution and estimate the mode:
| I.Q. Score | 80-100 | 100-120 | 120-140 | 140-160 | 160-180 | 180-200 |
| No. of Students | 6 | 9 | 16 | 13 | 4 | 2 |
Solution
(a) Take 1cm = 1 unit and plot I. Q. Score on x-axis and no. of students on y axis.
(b) Draw a bar graph for the given data.
(c) From the histogram it is clear that class 120-140 has highest frequency i.e. 16
(d) Join the ends of the corresponding frequencies which meet at P and drop a perpendicular on the x-axis from P to Q. Q is the mode.
Therefore, Mode = 134
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