Determine the percent of time that tellers are working

Reference no: EM131729008

Bank manager Art Hill wants to determine the percent of time that tellers are working and idle. He decides to use work? sampling, and his initial estimate is that the tellers are idle 12?% 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 Hill to be 95.4595.45?% confident that the results will not be more than 6?% from the true result? = ______ ?(round your response up to the next whole? number).

Reference no: EM131729008

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