Question

Calculate the test statistic. Are you working with a normal or a t-distribution? If it is...

  • Calculate the test statistic.

  • Are you working with a normal or a t-distribution? If it is a t-distribution, report the

    degrees of freedom.

  • Is the observed statistic unusual or not? Justify with a probability.

  • Formally complete the hypothesis test. That is, compute a p-value, make a decision, and write out a final conclusion (in context).

  1. A school principal wants to test if it is true that high school juniors use the computer an average 3.2 hours a day. He selects a random sample of 50 high school juniors and finds out that they use the computer an average of 3.1 hours a day with standard deviation 0.1 hours.

Math   Statistics-And-Probability   
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