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Make a 99 confidence interval for the percentage of all

Question: In a random sample of 50 homeowners selected from a large suburban area, 19 said that they had serious problems with excessive noise from their neighbors.

a. Make a 99% confidence interval for the percentage of all homeowners in this suburban area who have such problems.

b. Suppose the confidence interval obtained in part a is too wide. How can the width of this interval be reduced? Discuss all possible alternatives. Which option is best?

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