Times for a surgical procedure are normally distributed. There are two methods. MethodA has a mean of 24 minutes and a standard deviation of 6 minutes, while method B has a mean of 28 minutes and a standard deviation of 3.0 minutes.

(a)Which procedure is preferred if the procedure must be completed within 25 minutes?

Method A

Method B

Either method

(b)Which procedure is preferred if the procedure must be completed within 34.0 minutes?

Method A

Method B

Either method

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

Method A

Method B

Either method