(Answered) Find the standard deviation of the sample proportion

Management Studies

Problem: A survey of 200 CEOs finds that 122 of them think that the economy will improve next year. Is there evidence that the rate is higher among all CEOs than the 55% reported by the public at large? Be detailed in your response and provide examples also.

Required:

a) Find the standard deviation of the sample proportion based on the null hypothesis.

b) Find the z-statistic.

c) Does the z-statistic seem like a particularly large or small value?

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