The width of the confidence interval estimate of the population mean $\mu$ is a function of only two quantities, the population standard deviation $\sigma$ and the sample size n.

Question

Quizplus · Accepted Answer

The width of the confidence interval for the population mean μ also depends on the confidence level chosen (e.g., 90%, 95%, 99%), which affects the value of the critical z or t statistic used in the calculation, in addition to the population standard deviation (or its estimate) and the sample size.

The Width of the Confidence Interval Estimate of the Population μ\muμ

The Width of the Confidence Interval Estimate of the Population $\mu$