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Various studies indicate that approximately 8% of the world's population is left handed. You think this number is actually higher. You take an SRS of 223 people and find that 22 of them are left handed. Test your claim at the 5% significance level.
Part a: State your null and alternative hypotheses.
Part b: Sketch the rejection region.
Part c: Calculate the test statistic. Plot this value in your sketch in part b.
Part d: Determine the P-value for your test.
Part e: State your conclusions clearly in complete sentences.
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How many participants need to be enrolled in each group to achieve 80% power using a two-sided test with significance level =.05
Use the formula for expected value to verify your intuition.
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