Question

An 80% confidence interval is found to be (200, 240). What is the margin of error?A. 32B. 20C. 40D. 16

Answer 1

Answer: B

The margin of error is equal to 20

`M\mathrm{}E=20`

Step-by-step explanation:

Given that the 80% confidence interval is found to be;

`(200,240)`

The width of the interval is;

`240-200=40`

The margin of error is always half the width, so the margin of error is;

`\begin{gathered} M\mathrm{}E=(40)/(2) \\ M\mathrm{}E=20 \end{gathered}`

Therefore, the margin of error is equal to 20