Question

state the method to determine the number of classes on the basis of range of data and class length
​

Answer 1

Answer:

The steps in grouping may be summarized as follows:

Decide on the number of classes.

Determine the range, i.e., the difference between the highest and lowest observations in the data.

Divide range by the number of classes to estimate approximate size of the interval (h).

Answer 2

Explanation:

When the sample contains a large number of individuals , it's not easy to get a clear idea of statistical distribution of its elements. That's why we often proceed to group this values into classes and in these conditions, it is advisable to devide the data into classes of the same amplitude. is there any formula to do that