Times for a surgical procedure are normally distributed. There are two methods. Method A has a mean of 28 minutes and a standard deviation of 2 minutes, while method B has a mean of 32 minutes and a standard deviation of 1.0 minutes.
(A)Which procedure is preferred if the procedure must be completed within 30 minutes?
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(B)Which procedure is preferred if the procedure must be completed within 34.0 minutes?
(c) Which procedure is preferred if the procedure must be completed within 31 minutes?
