A study was done to investigate if number of friends is a predictor of aggression in children, as measured by a checklist ranging from 0-10. A sample of 48 participants was used. Assume an alpha level of .05. Select the appropriate null hypothesis.      Number of friends is not a predictor of aggression.     Number of friends is related to aggression.     p = 0     Number of friends is a predictor of aggression.     At least one pair of means is different

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