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Suppose we are testing the null hypothesis that a coin is fair: p = 1/2. We do n ips and observe k heads; it turns out k is greater than the expected mean u = n/2. In fact k is more than 3 standard deviations above the mean: k > p + 30. Which of the following must be true then? k > .7n .7n 2 k > .6n .6n 2 k > .55n .55n 2 k > .51n Not enough information is given