Determine the Confidence Level for Each of the Following Large-Sample $\bar { x } + .84$

Essay

Determine the confidence level for each of the following large-sample one-sided confidence bounds:
a. Upper bound: $\bar { x } + .84$ $\bar { x } + .84 s / \sqrt { n }$
b. Lower bound: $\bar { x } - 2.05 s / \sqrt { n }$
c. Upper bound: $\bar { x } + .67 s / \sqrt { n }$