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 6.56

6.56 Finding signifcant -scores.

Consider a two-sided significance test for a population mean.

  1. Sketch a Normal curve similar to that shown in Figure 6.13 (page 323), but find the value such that .
  2. Based on your curve from part (a), what values of the statistic are statistically signifcant at the level?

326