For a given confidence level and population standard deviation, which of the following is true in the interval estimation of the population mean?
A) If the sample size is bigger, the interval is narrower.
B) If the sample size is smaller, the interval is narrower.
C) If the population size is bigger, the interval is narrower.
D) If the population size is smaller, the interval is narrower.

Question

Quizplus · Accepted Answer

As the sample size increases, the standard error of the mean decreases, resulting in a narrower interval. The population size does not affect the interval width.

For a Given Confidence Level and Population Standard Deviation, Which