For Exercises 3–14, do the following:

  1. State the hypotheses.
  2. Calculate the critical value and state the rejection rule. Also, sketch the critical region.
  3. Find the test statistic .
  4. State the conclusion and the interpretation.

Question 9.207

11. vs. , , , , , population is normal

9.4.11

(a) (b) . Reject if or if .

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(c) (d) Since is not and not , the conclusion is do not reject . There is insufficient evidence at the 0.10 level of significance that the population mean differs from 1000.