When a greater proportion of the total population is sampled for inclusion in the estimation of mean age, the confidence interval for the mean age will be wider because there is greater certainty about the sample mean being close to the population mean.

Question

Quizplus · Accepted Answer

A greater proportion of the population sampled generally leads to a narrower confidence interval, as it increases the precision of the estimate and reduces uncertainty about the sample mean being close to the population mean.

When a Greater Proportion of the Total Population Is Sampled