其它
\textbf{From a random sample of 1,005 adults in the United States, it was found that 32 percent own an e-reader. Which of the following is the appropriate 90 percent confidence interval to estimate the proportion of all adults in the United States who own an e-reader?~} 
Overseas Competition->Knowledge Point->Calculation Modules
\textbf{$\hat{p} \pm z^{*}\sigma\_{\hat{p}}=\hat{p} \pm Z\_{\frac{\alpha}{2}}\sqrt{\frac{\hat{p}(1-\hat{p})}{n}}= 0.32 \pm Z\_{0.05}\sqrt{\frac{(0.32)(0.68)}{1005}}$} 