The confidence intervals for two separate samples would be expected to differ because
A) the sample means differ.
B) the sample standard deviations differ.
C) the sample sizes differ.
D) all of the above

Question

Quizplus · Accepted Answer

Confidence intervals are calculated based on the sample mean, sample standard deviation, and sample size. Therefore, if any of these factors differ between two separate samples, their confidence intervals are likely to differ as well. Therefore, all of the choices given (sample means, sample standard deviations, and sample sizes) can affect the difference in confidence intervals between two separate samples.

The Confidence Intervals for Two Separate Samples Would Be Expected