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 9.204

8. A random sample of size 100 from a population with an unknown distribution yields a sample mean of −5 and a sample standard deviation of 5. Researchers are interested in finding whether the population mean is less than −4, using level of significance .