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Times for a surgical procedure are normally distributed. There are two methods. MethodAhas a mean of 31 minutes and a standard deviation of 6 minutes, while methodBhas a mean of 35 minutes and a standard deviation of 3.0 minutes.

(a)Which procedure is preferred if the procedure must be completed within 32 minutes?

multiple choice 1

• Method A
• Method B
• Either Method

(b)Which procedure is preferred if the procedure must be completed within 42.0 minutes?

Method A

(c)Which procedure is preferred if the procedure must be completed within 39 minutes?

Method A