Times for a surgical procedure are normally distributed. There are two methods. MethodAhas a mean of 25 minutes and a standard deviation of 8 minutes, while methodBhas a mean of 29 minutes and a standard deviation of 4.0 minutes.

(a)Which procedure is preferred if the procedure must be completed within 27 minutes?

• Method A
• Method B
• Either Method

(b)Which procedure is preferred if the procedure must be completed within 35.0 minutes?

Method A

(c)Which procedure is preferred if the procedure must be completed within 33 minutes?

Method A