In an example where the 95% confidence interval is 73.61 and 76.39, which of the following is NOT true?
A) We are 95% confident that the true mean lies between the values
B) We are absolutely certain of the value of the true population mean
C) We have a high confidence level in accurately estimating the population mean
D) Confidence intervals are valid only when the means are obtained with random sampling

Question

Quizplus · Accepted Answer

Confidence intervals provide a range of values within which we expect the true population mean to lie with a certain level of confidence (e.g., 95%), but they do not guarantee the exact value of the true population mean. Thus, we cannot be absolutely certain of the true population mean's value based solely on a confidence interval.

In an Example Where the 95% Confidence Interval Is 73