11. Military patients entering the Veterans Hospital in Anchorage have complained that it takes sixty minutes to ...

11. Military  patients  entering  the Veterans Hospital  in Anchorage  have complained that it takes sixty minutes to fill out the required  forms for admittance. As a result of all the complaints, the forms and procedures  have been revised.  A recent analysis of a random  sample of nine incoming patients  reveals that the mean time to fill out forms  is now fifty  minutes  with  a standard deviation  of five minutes.  Is  there sufficient evidence at a five percent significance level to show that  the system is an improvement?  Assume the population  standard deviation  is unknown. Use the "t" procedure.

12. Dr. Thomas Brady  gave a Principles of Internal Medicine examination  and he assumed the results to be normally  distributed with a mean of 59 and  a standard deviation  of 8.  He wants  to assign an "A"  to the top five percent.  What  is the starting score for an "A"?

Starting Score:  _