When creating a grouped frequency distribution, it is best to start with 2 groups and then work your way up until a desired amount is reached.

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Quizplus · Accepted Answer

It is best to start with a small number of groups, such as 5-10, and adjust based on the range and distribution of the data. Starting with only 2 groups may not provide enough detail or accuracy in the distribution.

When Creating a Grouped Frequency Distribution, It Is Best to Start