7.1

a. For each situation, find Z (critical).

Alpha Form Z (Critical)

0.05 One-tailed 0.10 Two-tailed 0.06 Two-tailed 0.01 One-tailed 0.02 Two-tailed

b. For each situation, find 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 31 0.05 One-tailed 61

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

for each situation:

1. m 5 2.40 X52.20 s 5 0.75 n 5 200 2. m 5 17.1 X516.8 s 5 0.9 n 5 45 3. m 5 10.2 X59.4 s 5 1.7 n 5 150 4. Pm 5 0.57 Ps 5 0.60 n 5 117 5. Pm 5 0.32 Ps 5 0.30 n 5 322