Question

The CI for the proportion is (0.72 - 0.03, 0.72 + 0.03) = (0.69, 0.75) ME = z*sqrt(p*q/n) 0.03 = z*sqrt(0.72 * 0.28/1096) z = 0.03/sqrt(0.72 * 0.28/1096) z = 2.2120 The interval is a 97.3% CI The CI is (0.4 - 0.03, 0.4+0.03) = (0.37, 0.43) ME = z*sqrt(p*q/n) 0.03 = z*sqrt(0.4 * 0.6/1096) z = 0.03/sqrt(0.4 * 0.6/1096) z = 2.0273 The interval is a 95.7% CI How was the interval found in these questions? The Z-score chart shows these as wrong

Answer 1