Which term is a range of values used to estimate a population parameter and is associated with a specific confidence level?

Which term is a range of values used to estimate a population parameter and is associated with a specific confidence level?

• A. Point Estimate
• B. Interval Estimate
• C. Margin of Error
• D. Confidence Interval

Answer: (D)

A confidence interval is a range of values used to estimate a population parameter and is associated with a specific confidence level. It starts from a sample statistic, like a sample mean, and includes a margin of error to form an interval. The confidence level (for example, 95%) expresses how often this method would produce intervals that contain the true parameter if we repeated the study many times. A wider interval reflects more uncertainty, while a higher confidence level typically makes the interval wider as well. The margin of error is the distance from the point estimate to either end of the interval, but the interval itself is the range it defines. The other terms describe parts of the idea or a single value, not the range tied to a confidence level.

A confidence interval is a range of values used to estimate a population parameter and is associated with a specific confidence level. It starts from a sample statistic, like a sample mean, and includes a margin of error to form an interval. The confidence level (for example, 95%) expresses how often this method would produce intervals that contain the true parameter if we repeated the study many times. A wider interval reflects more uncertainty, while a higher confidence level typically makes the interval wider as well. The margin of error is the distance from the point estimate to either end of the interval, but the interval itself is the range it defines. The other terms describe parts of the idea or a single value, not the range tied to a confidence level.