Chapter 6 - Confidence Intervals - Section 6.3 Confidence Intervals for Population Proportions - Exercises - Page 325: 9

E = 0.042 $\hat{p} = 0.554$

Lower Bound: 0.596, Upper Bound: 0.512, i) Find Error Width of Interval = Upper Bound - Lower Bound (0.596 - 0.512) = $\hat{p} + E - (\hat{p} - E)$ 0.084 = 2E E = 0.042 ii) Find $\hat{p}$ $\hat{p} - E = Lower Bound$ $\hat{p} = Lower Bound + E$ $\hat{p} = 0.512 + 0.042$ $\hat{p} = 0.554$