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The caffeine content (in milligrams) of a random sample of 50 cups of black coffee...

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Accounting

The caffeine content (in milligrams) of a random sample of 50 cups of black coffee dispensed by a new machine is measured. The mean from the sample is 96 mg with a variance of 50.41mg2 The machine is capable of dispensing 3000 cups per day, whose caffeine content is normally distributed

Question 2 of Online Tutorial 5

Test at 20% significance level whether one of the drugs is more effective than the other.

    • The absolute value of the critical value of this test is
    • The absolute value of the calculated test statistic is
    • The p-value of this test is
  • Question 3 of Online Tutorial 5

  • Test at the 10% significance level whether the two lots have different variances

  • The calculated test statistic is
  • The p-value of this test is

  • Assuming the two variances are equal, test at the 0.5% significance level whether the 2 lots have different average pH.

    • The absolute value of the critical value of this test is
    • The absolute value of the calculated test statistic is
    • The p-value of this test is

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