1. In Exercises 1– 4, find the critical value tc for the level of confidence c and sample size n.
1. c = 0.90, n = 10 2. c = 0.95, n = 12
3. c = 0.99, n = 16 4. c = 0.98, n = 40
2. In Exercises 5– 8, find the margin of error for the values of c, s, and n.
5. c = 0.95, s = 5, n = 16 6. c = 0.99, s = 3, n = 6
7. c = 0.90, s = 2.4, n = 35 8. c = 0.98, s = 4.7, n = 9
3. In Exercises 9 –12, construct the indicated confidence interval for the population mean m using the t-distribution.
9. c = 0.90, x = 12.5, s = 2.0, n = 6
10. c = 0.95, x = 13.4, s = 0.85, n = 8
11. c = 0.98, x = 4.3, s = 0.34, n = 14
12. c = 0.99, x = 24.7, s = 4.6, n = 50