Jasmine has decided to decrease the confidence level in her estimation of a population proportion. What is the effect on the width of the associated confidence interval?

A)The width of the confidence interval increases.
B)The width of the confidence interval decreases.
C)The width of the confidence interval is unchanged.
D)There is not enough information to say.

Question

Jasmine has decided to decrease the confidence level in her estimation of a population proportion. What is the effect on the width of the associated confidence interval? ​
​
A)The width of the confidence interval increases.
B)The width of the confidence interval decreases.
C)The width of the confidence interval is unchanged.
D)There is not enough information to say.

Quizplus · Accepted Answer

Decreasing the confidence level results in a narrower (smaller) confidence interval because a lower confidence level means you are accepting a higher chance of error, thus requiring less range to capture the true population parameter.

Jasmine Has Decided to Decrease the Confidence Level in Her