SOLUTION: A phone company administers a survey, regarding customer satisfaction, Based on the survey results, the company provides a confidence interval estimate of 40% to 70% for customer s

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Question 1062045: A phone company administers a survey, regarding customer satisfaction, Based on the survey results, the company provides a confidence interval estimate of 40% to 70% for customer satisfaction. If the company wishes to construct a confidence interval that more accurately represents the proportion of customer satisfaction, how should the design be altered? A. Use a smaller sample size. B. Use a larger sample size. C. Use a larger confidence level. D. Use a smaller confidence level.
Answer by Boreal(15235) About Me  (Show Source):
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The single best answer is to use a larger sample size. This will narrow any CI constructed. Smaller sample size would be worse. More confident produces a larger interval; less confident produces a narrower interval but at a cost.