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प्रश्न
Use graph paper for this question, take 2 cm = 10 marks along one axis and 2 cm = 10 students along the other axis.
The following table shows the distribution of marks in a 50 marks test in Mathematics:
| Marks | 0 - 10 | 10 - 20 | 20 - 30 | 30 - 40 | 40 - 50 |
| No. of. Students | 6 | 10 | 13 | 7 | 4 |
Draw the ogive for the above distribution and hence estimate the median marks.
आलेख
योग
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उत्तर
| Marks | No. of. students | c.f. |
| 0 - 10 | 6 | 6 |
| 10 - 20 | 10 | 6 + 10 = 16 |
| 20 - 30 | 13 | 16 + 13 = 29 |
| 30 - 40 | 7 | 29 + 7 = 36 |
| 40 - 50 | 4 | 36 + 4 = 40 |
| n = 40 |
Median =`(40/2)^"th" = 20^"th"` term
∴ Median = 23
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