A confidence interval is defined as:
A) a point estimate plus or minus a specific level of confidence.
B) a lower and upper confidence limit associated with a specific level of confidence.
C) an interval that has a 95% probability of containing the population parameter.
D) a lower and upper confidence limit that has a 95% probability of containing the population parameter.
E) the difference between the observed sample statistic and the actual value of the population parameter being estimated.

Question

Quizplus · Accepted Answer

A confidence interval is a range of values, derived from a sample, that is used to estimate an unknown population parameter with a specified level of confidence. It is represented by two values: a lower confidence limit (LCL) and an upper confidence limit (UCL), which indicates a range of values that the true population parameter is likely to be within. Therefore, option B, a lower and upper confidence limit associated with a specific level of confidence, is the correct choice.

A Confidence Interval Is Defined As