A state highway patrol official wishes to estimate the number of legally intoxicated drivers on a certain road. a) How large a sample is needed in order to be 99% confident that the sample proportion...

A state highway patrol official wishes to estimate the number of legally intoxicated

drivers on a certain road.

a) How large a sample is needed in order to be 99% confident that the sample proportion will

not differ from the true proportion by more than 5%?

b) Repeat part (a) assuming previous studies found that 75% of the drivers on this road are

legally intoxicated.

Jun 08, 2022

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