Supervisor Kenneth Peterson wants to determine the percent of time a machine in his area is idle.
He decides to use work? sampling, and his initial estimate is that the machine is idle 20% of the time. ?
(Round all intermediate calculations to at least two decimal places before proceeding with further? calculations.)
The number of observations that need to be taken by Peterson to be 99?% confident that the results will be less than 4% from the true result? =_____ ?
(round your response to the immediate higher whole? number).