The width of a confidence interval estimate of the population mean widens when the:
A)level of confidence increases.
B)sample size increases.
C)population standard deviation decreases.
D)Sample mean gets further from the population mean.

Question

Quizplus · Accepted Answer

The width of a confidence interval for estimating the population mean increases as the level of confidence increases because a higher confidence level means capturing a broader range of values to ensure the true population mean is within the interval, thus requiring a wider interval.

The Width of a Confidence Interval Estimate of the Population