Knowing the population standard deviation,a 95% confidence interval infers that the population mean ________.
A)is between 0 and 100%
B)is within ±1.96 standard deviations of the sample mean
C)is within ±1.96 standard errors of the sample mean
D)is too large

Question

Quizplus · Accepted Answer

A 95% confidence interval for the population mean, when the population standard deviation is known, is calculated as the sample mean plus or minus 1.96 times the standard error of the mean.

Knowing the Population Standard Deviation,a 95% Confidence Interval Infers That