The number of classes is 5 then the size of class interval for the data 11,12,12,13,14,15,17,18,20,22 will be:

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9 + 2 =
Solve this simple math problem and enter the result. E.g. for 1+3, enter 4.

The number of classes is 5 then the size of class interval for the data 11,12,12,13,14,15,17,18,20,22 will be:

4

3

5

2