a. For each situation, fi nd Z(critical).

Alpha Form Z(Critical) 0.05 One-tailed 0.10 Two-tailed 0.06 Two-taile 0.01 One-tailed 0.02 Two-tailed

b. For each situation, fi nd the critical t score.

Alpha Form N t (Critical) 0.10 Two-tailed 31 0.02 Two-tailed 24 0.01 Two-tailed 121 0.01 One-tailed 310.05 One-tailed 61

c. Compute the appropriate test statistic (Z or t)

for each situation:

1. µ = 2.40 X — = 2.20

= 0.75 N = 200 2. µ = 17.1 X — = 16.8 s = 0.9 N = 45 3. µ = 10.2 X — = 9.4 s = 1.7 N = 150 4. Pu = .57 Ps = 0.60 N = 117 5. Pu = 0.32 Ps = 0.30 N = 322