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Question
Write the median class of the following distribution:
| Class-interval: | 0−10 | 10−20 | 20−30 | 30−40 | 40−50 | 50−60 | 60−70 |
| Frequency: | 4 | 4 | 8 | 10 | 12 | 8 | 4 |
Solution
Consider the following distribution table.
| Class | Frequency | C.F. |
| 0−10 | 4 | 4 |
| 10−20 | 4 | 8 |
| 20−30 | 8 | 16 |
| 30−40 | 10 | 26 |
| 40−50 | 12 | 38 |
| 50−60 | 8 | 46 |
| 60−70 | 4 | 50 |
| N = 50 |
Here,
`N = 50`
`N/2 = 25`
The cumulative frequency just greater than 25 is 26.
So, the median class is 30−40.
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