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?

Answer rating: 100% (QA)

b In case a if we decrease ... View the full answer