Answer
.916 +- .111
Work Step by Step
p = $\frac{20+2}{20+4}$ = .916
p +- z $\sqrt \frac{p(1-p)}{n+4}$
= .916 +- 1.96 $\sqrt \frac{.916(1-.916)}{24}$
= .916 +- .111
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