A 95% confidence interval for the mean:
A)defines the range of scores in which there is a .95 probability the population mean will fall
B)is computed using the standard error of the mean
C)is unaffected by the "confidence level" you choose
D)both a and b

Question

Quizplus · Accepted Answer

A 95% confidence interval for the mean defines the range of scores in which there is a 0.95 probability the population mean will fall. This interval is computed using the standard error of the mean. Therefore, both statements A and B are correct, and the answer is D. Statement C is incorrect because the confidence level directly affects the width of the interval. A higher confidence level would result in a wider interval, while a lower confidence level would result in a narrower interval.

A 95% Confidence Interval for the Mean