Which of the following is true of confidence intervals?
A)Two quantities and c are required to construct the confidence intervals.
B)To obtain the value c in the confidence interval, only the degrees of freedom need to be known.
C)Confidence intervals are also called interval estimates.
D)A constructed confidence intervals will always contain the population parameter .

Question

Which of the following is true of confidence intervals?
A)​Two quantities and c are required to construct the confidence intervals. 
B)To obtain the value c in the confidence interval, only the degrees of freedom need to be known. 
C)Confidence intervals are also called interval estimates. 
D)​A constructed confidence intervals will always contain the population parameter .

Quizplus · Accepted Answer

Confidence intervals are also known as interval estimates. Choice A is incorrect because only one quantity (the margin of error) and a sample statistic are required to construct confidence intervals. Choice B is incorrect because the value of c (the critical value) depends on the level of confidence and sample size, in addition to the degrees of freedom. Choice D is incorrect because while confidence intervals provide a range of plausible values for the population parameter, there is no guarantee that the true value lies within the interval.

Which of the Following Is True of Confidence Intervals