<PRE><B>Question 1177123</B>
&lt;pre&gt;&lt;font face = &quot;consolas&quot; color = &quot;indigo&quot; size = 3&gt;&lt;b&gt;
Hi
n &gt; 60    x̄ = 56/80 = .7
two tailed: 90% confidence interval:  z = 1.645

ME = 1.645*sqrt((.7*.3)/80)) = .0843

.7- ME &lt; {{{mu}}} &lt; .7 + ME

CI:  (.62, .78)

Wish You the Best in your Studies.
&lt;/font&gt;&lt;/b&gt;&lt;/pre&gt;
</PRE>