(a) What z-score is used for a 99% confidence interval to estimate a population proportion? (skip the z-table, get one more decimal place of accuracy from the notes, your calculator, or click this...

(a) What z-score is used for a 99% confidence interval to estimate a population proportion? (skip the z-table, get one more decimal place of accuracy from the notes, your calculator, or click this online calculator.) Use 3 decimal places in your answer.


(b) What z-score is used for a 88% confidence interval? Round your answer to 2 decimal places.


(c) What z-score is used for a 93% confidence interval? Round your answer to 2 decimal places.