When a researcher increases the confidence level from 95% to 99%, the wider interval implies ______.
A) increased precision in estimating the population mean
B) a lower confidence that the interval contains the population mean
C) a loss of precision in estimating the sample mean
D) decreased precision in estimating the population mean

Question

Quizplus · Accepted Answer

Increasing the confidence level from 95% to 99% results in a wider confidence interval, which implies decreased precision in estimating the population mean. This is because a wider interval covers a broader range of values, indicating less certainty about the exact value of the population mean.

When a Researcher Increases the Confidence Level from 95% to 99