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Two-Way Tables and Examples

What is the importance of hypothesis testing for independence of variables using two-way tables? Is there an example of this for a better understanding?

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When you hypothesis test between two variables, sometimes you know that one group will be bigger or smaller then another group. However, sometimes, we are not sure what direction the effect will be, and we can just say that we assume that the two variables are different (without specifying a direction). This is ...

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