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Question
Construct a histogram and then a frequency polygon for the following frequency distribution.
| Class Interval | 0-10 | 10-20 | 20-30 | 30-40 | 40-50 | 50-60 |
| Frequency | 8 | 13 | 27 | 35 | 14 | 3 |
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 rectangle 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 (5,8),(15,13),(25,27),(35,35),(45,14),(55,3).
5. Mark two more midpoints of zero frequency on x-axis at the start and at the end.
6. Now connect the points using straight lines.
| Class Interval | Frequency |
| 0-10 | 8 |
| 10-20 | 13 |
| 20-30 | 27 |
| 30-40 | 35 |
| 40-50 | 14 |
| 50-60 | 3 |
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Use graph paper to Solution this question.
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