We reviewed thousands of studies to identify all available evidence for the effects of 13 gun policies on eight outcomes. or six of the 13 policies, either we found no studies examining the effects on any of the outcomes we considered or the evidence was inconclusive. However, we found some evidence that seven policies affect one or more of four of the outcomes, as Discuss what type of test statistic was used to test the hypothesis. Why was that particular statistic used? Discuss the results of the hypothesis test.
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