Answer
A class width should be an ideal representation of the overall data. However, there aren’t any rigid rules that need to be kept in mind while selecting a class width, as it is an arbitrary decision.
Work Step by Step
The Rice Rule states that the class chosen should be at least twice the cube root of the total observations. The Sturgis rule states that there are no rigid rules, and no perfect choice can be made in this respect. Thus, choosing a width is nothing more than artwork.
