1. Consider the database transaction problem. Let us say the CIO announces
   in a management meeting that, on average, the mean response time of
   transactions is 47.0ms. The Operations manager immediately disagrees and
   states that database performance is poor. He goes on to say that performance
   is worse than the CIO is claiming and states that he has evidence to support
   his position.

   a) Identify and state the null and alternative hypotheses.
   b) The Operations manager provides data from a random sample of 17 
      transactions which indicates that the average response time is
      54.5ms with standard deviation 18.0ms. Given the hypotheses for part
      a above, conduct a test of significance.

2. A local company assembles customized workstations. The quality assurance 
   department monitors the quality of components from suppliers by selecting 
   random samples from each delivered batch and then rigorously testing each 
   component in the batch. The chief quality assurance engineer is interested 
   in a large batch of recently delivered disk drives. She believes that the
   supplier is producing drives that are slower than the production manager
   claims (i.e. mean seek time of 10.0ms). 

   a) Identify and state the null and alternative hypotheses.
   b) The engineer examines a sample of 81 drives and discovers that the
      mean seek time of these drives is 10.15ms with standard deviation 
      0.90ms. Given your hypotheses for part a above, conduct a test of 
      hypotheses.
   c) Given your findings, do you think a point estimate for the parameter
      in question is appropriate. Justify your answer.