A coin was flipped 69 times and came up heads 39 times. At the .10 level of significance, is the coin biased toward heads?   (a-1) H0: ππ ≤ .50 versus H1: ππ > .50. Choose the appropriate decision rule at the .10 level of significance.   Reject H0 if z > 1.282 Reject H0 if z < 1.282   a b   (a-2) Calculate the test statistic. (Carry out all intermediate calculations to at least 4 decimal places. Round your answer to 3 decimal places.)   Test statistic               (a-3) The null hypothesis should be rejected.   False True

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.