The critical value

1. Find the critical value ze necessary to construct a confidence interval at the level of confidence, c. Round to the nearest 1001^.
o. c = 0.86 b. c = 0.92
2. Find the margin of error for the values. Round to the nearest 1000th:
c = 0.95 a = 5.7 n = 40
3. Use the confidence interval to find the morgin of error and the sample mean:
(21.61, 30.15)