Mathematics
In the class-intervals 1-10, 11-20, 21-30; the class 11-20 after adjustment is :
0.5-10.5
20.5-30.5
10.5-30.5
10.5-20.5
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Answer
The adjustment factor is
The adjusted class would then be as follows:
| Class interval before adjustment | Class interval after adjustment |
|---|---|
| 1 - 10 | 0.5 - 10.5 |
| 11 - 20 | 10.5 - 20.5 |
| 21 - 30 | 20.5 - 30.5 |
The class 11-20 after adjustment is 10.5-20.5.
Hence, option 4 is the correct option.
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