Question: 13.84 Why an F test? When a model has a very large number of predictors, even when none of them truly have an effect in

13.84 Why an F test? When a model has a very large number of predictors, even when none of them truly have an effect in the population, one or two may look significant in t tests merely by random variation. Explain why performing the F test first can safeguard against getting such false information from t tests.

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