Increasing the number of scores in a sample from 10 to 20 increases the width of a confidence interval to estimate the population mean.(Assume that all other factors are held constant.)

Question

Quizplus · Accepted Answer

Increasing the number of scores in a sample generally decreases the width of a confidence interval because the standard error of the mean decreases as sample size increases, leading to a more precise estimate of the population mean.

Increasing the Number of Scores in a Sample from 10