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Question
Construct a histogram and then a frequency polygon for the following frequency distribution.
| Class Interval | 100-150 | 150-200 | 200-250 | 250-300 | 300-350 |
| Frequency | 10 | 15 | 17 | 12 | 10 |
Solution
Steps :
1. On the x-axis, take 1 cm as 5 units and plot class interval.
2. On the y-axis , take 1 cm as 5 units and plot frequency .
3. Draw rectangles of histogram as per given data .
4. For each rectangle , mark the midpoint of its length at the top part . In this case , points are (125.10),(175,15),(225,17),(275,12),(325,10).
5. Mark two more midpoints of Zero frequency on x-axis at the start and at th end .
6. Now connect the points using straight lines.
| Class Interval | Frequency |
| 100-150 | 10 |
| 150-200 | 15 |
| 200-250 | 17 |
| 250-300 | 12 |
| 300-350 | 10 |
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Use graph paper to Solution this question.
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Draw a histogram and hence find the mode of the given distribution.
