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## If you want to be 99% confident of estimating the population proportion to within a sampling error of +/- 0.06, what sample size is needed?

If you want to be 99% confident of estimating the population proportion to within a sampling error of +/- 0.06, what sample size is needed?

a. A sample size of ___ is needed.

[b] What sample size would be needed to have 99 % confidence of estimating the population proportion to within a sampling error of 0.09 when we have reliable information that the population proportion pi = 0.24?