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Question
Draw a histogram from the following frequency distribution and find the mode from the graph:
| Class | 0-5 | 5-10 | 10-15 | 15-20 | 20-25 | 25-30 |
| Frequency | 2 | 5 | 18 | 14 | 8 | 5 |
Solution 1
Steps for calculation of mode.
(1) Mark the endpoints of the upper corner of the rectangle with maximum frequency
as A and B.
(2) Mark the inner corner of adjacent rectangles as C and D.
(3) Join AC and BD to intersect at K. From K, draw KL perpendicular to the x-axis.
(4) The value of L on the x-axis represents the mode. Thus, Mode = 13
Solution 2
Mode = 13·6
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