Answer: The width of the confidence interval is 8%.
Step-by-step explanation:
Given : A 90 percent confidence interval to estimate a population proportion was calculated from a Sample proportion = 18 % .
Margin of error = 4 %.
Then , the width of the confidence interval = 2 x (Margin of error)
= 2 x (4%)
= 8%
Hence, the width of the confidence interval is 8%.
The width of the confidence interval is 8% and this can be determined by using the formula of the width of the confidence interval.
Given :
Suppose a 90 percent confidence interval to estimate a population proportion was calculated from a sample proportion of 18 percent and a margin of error of 4 percent.
The formula of the width of the confidence interval is given by:
Width of the confidence interval = 2 [tex]\times[/tex] (Margin of Error)
Now, substitute the known terms in the above formula.
Width = 2 [tex]\times[/tex] 4%
Width = 2 [tex]\times[/tex] 0.04
Width = 0.08
Width = 8%
So, the width of the confidence interval is 8%.
For more information, refer to the link given below:
https://brainly.com/question/22771970
