For Exercises 29 and 30, assume normality of the data, and do the following:

  1. State the hypotheses.
  2. Find the critical value or values, and state the rejection rule.
  3. Find . Also, draw a distribution and indicate and the critical value or values.
  4. State the conclusion and the interpretation.

Question 9.415

30. We are testing whether and have a random sample of size 26 with a sample variance of 90. Let .