You wish to determine whether the difference between the experimental group and the control group was statistically significant. To make that determination, you will need to know three of the following types of information. Which one will you NOT need to know?

Question

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The ages of the participants in each group are not relevant to determining statistical significance. The three pieces of information that are needed are the number of participants in each group, the amount of variation among participants within each group, and the difference between the means of the two groups.

You Wish to Determine Whether the Difference Between the Experimental