When you are comparing three groups of people rather than comparing two sets of scores from the same people, you have:

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When comparing three groups of people, the data are independent because they come from separate groups and are not related to each other. Dependent data would be if you were comparing two sets of scores from the same people, such as their scores before and after a treatment. Linked data would suggest a more complex relationship between the groups, which is not necessarily the case in this scenario. Grouped data refers to data that has been organized into categories or ranges, which is not necessarily applicable to this question.

When You Are Comparing Three Groups of People Rather Than