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1. A poll found that out of 600 people polled, 72% of them owned and regularly...

1. A poll found that out of 600 people polled, 72% of them owned and regularly used data on their smartphone.

a. Determine a 99% CI.

b. Determine the margin of error for the CI in part (a). Round to three decimal places. c. For a 99% CI and a margin of error of 0.01, determine the necessary sample size for estimating ?.

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