Construct a 90% confidence interval of the population proportion using the given information. x = 120, n = 300 Click here to view the table of critical values. The lower bound is X Table of critical values The upper bound is. (Round to three decimal places as needed.) Level of Confidence, Area in Each Tail, ? Critical Value, z; (1 - c) . 100% 90% 0.05 1.645 95% 0.025 1.96 99% 0.005 2.575 Print Done