ANSWER:
0.1385
STEP-BY-STEP EXPLANATION:
The margin of error can be calculated as follows:
[tex]\begin{gathered} \hat{p}=\frac{0.554+0.831}{2} \\ \hat{p}=0.6925 \\ \text{ Margin of error }=\text{ upper confidence interval - }\hat{p} \\ \text{ Margin of error }=0.831-0.6925 \\ \text{ Margin of error }=0.1385 \end{gathered}[/tex]
Therefore, the margin of error is 0.1385
