a. The proportion of successes in a random sample of 400 was calculated as 50%. Estimate the

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a. The proportion of successes in a random sample of 400 was calculated as 50%. Estimate the population proportion with 95% confidence.

b. Repeat part a with .

c. Repeat part a with .

d. Discuss the effect on the width of the confidence interval estimate of reducing the sample proportion.

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Statistics For Management And Economics

ISBN: 9781133420774

9th Edition

Authors: Gerald Keller, Kenneth C Louden

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