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प्रश्न
Use graph paper for this question.
The table given below shows the monthly wages of some factory workers.
- Using the table, calculate the cumulative frequencies of workers.
- Draw a cumulative frequency curve.
Use 2 cm = ₹ 500, starting the origin at ₹ 6500 on x-axis, and 2 cm = 10 workers on the y-axis.
| Wages (in ₹.) | 6500-7000 | 7000-7500 | 7500-8000 | 8000-8500 | 8500-9000 | 9000-9500 | 9500-10000 |
| No. of workers | 10 | 18 | 22 | 25 | 17 | 10 | 8 |
आलेख
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उत्तर
i.
| Wages | No. of workers | c.f. |
| 6500-7000 | 10 | 10 |
| 7000-7500 | 18 | 28 |
| 7500-8000 | 22 | 50 |
| 8000-8500 | 25 | 75 |
| 8500-9000 | 17 | 92 |
| 9000-9500 | 10 | 102 |
| 9500-10000 | 8 | 110 |
Total = 110
ii.
Now plot the points (7000, 10), (7500, 28), (8000, 50), (8500, 75), (9000, 92), (9500, 102) and (10000, 110) and join them to obtain an ogive.
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