Times for a surgical procedure are normally distributed. These are two methods. Method A has a mean of 28 minutes and a standard deviation of 4 minutes, while method B has a mean of 32 minutes and a standard deviation of 2.0 minutes.

a. which procedure is preferred if the procedure must be completed in 29 minutes?

method A

method B

either method

b. Which procedure is preferred if the procedure must be completed within 38.0 minutes?

method A

Method B

either method

c. Which procedure is preferred if the procedure must be completed within 36 minutes?

method A

method B

either method