For Exercises 6.51 and 6.52, see pages 320–321; for 6.53 to 6.55, see pages 323–324; for 6.56 to 6.59, see pages 325–326; for 6.60 to 6.62, see pages 328–329; for 6.63 and 6.64, see page 331; and for 6.65 and 6.66, see page 332.

Question 6.65

6.65 -value and significance level.

The -value for a significance test is 0.023.

  1. Do you reject the null hypothesis at level ?
  2. Do you reject the null hypothesis at level ?
  3. Explain how you determined your answers in parts (a) and (b).

6.65

(a) Yes. (b) No. (c) Because , we reject . Because 0.023 > 0.01, we do not reject .