3 After an election 153 adults, from a random sample of 200 adults, said that they had voted. Using this information, an \(\alpha \%\) confidence interval for the proportion of all adults who voted in the election was found to be 0.695 to 0.835 , both correct to 3 significant figures. Find the value of \(\alpha\), correct to the nearest integer.
3 After an election 153 adults, from a random sample of 200 adults, said that they had voted. Using this information, an $\alpha \%$ confidence interval for the proportion of all adults who voted in the election was found to be 0.695 to 0.835 , both correct to 3 significant figures. Find the value of $\alpha$, correct to the nearest integer.\\
\hfill \mbox{\textit{CAIE S2 2017 Q3}}