ENGI 4421 Probability and Statistics

Faculty of Engineering and Applied Science


Hypothesis Test Question

Tutorial, week 11 (late July)


  1. State the appropriate null and alternative hypotheses.

  2. Conduct the appropriate hypothesis test.

  3. Should you advise the client to invest in the new process?

  4. What would the decision be if the sample mean had been 104 N?

          BONUS QUESTION:

  1. If the true mean breaking load of the new wires is 106.0 N, then what is the probability that another random sample of 36 wires, with the same sample standard deviation, will lead to an incorrect decision?

  2. What type of error is the event in part (e)?


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          Created 2007 11 08 and most recently modified 2019 07 19 by Dr. G.H. George