Answer: B
The margin of error is equal to 20
[tex]M\mathrm{}E=20[/tex]Explanation:
Given that the 80% confidence interval is found to be;
[tex](200,240)[/tex]The width of the interval is;
[tex]240-200=40[/tex]The margin of error is always half the width, so the margin of error is;
[tex]\begin{gathered} M\mathrm{}E=\frac{40}{2} \\ M\mathrm{}E=20 \end{gathered}[/tex]Therefore, the margin of error is equal to 20
