In calculating confidence intervals in a z distribution, start by finding the z scores centered around the:
A) population mean.
B) sample mean.
C) standard error.
D) sum of squares.

Question

Quizplus · Accepted Answer

Confidence intervals in a z distribution are calculated using the sample mean as the point estimate of the population mean. The z score reflects how many standard errors the sample mean is from the population mean. Therefore, we use the sample mean as the center point for calculating the confidence interval.

In Calculating Confidence Intervals in a Z Distribution, Start by Finding