The margin of error in the confidence interval for the difference equals the standard error multiplied by either or ,depending on whether or not the population variances are known.

Question

The margin of error in the confidence interval for the difference  equals the standard error  multiplied by either  or  ,depending on whether or not the population variances are known.

Quizplus · Accepted Answer

This statement is true. The margin of error in the confidence interval is calculated by multiplying the standard error by the appropriate value from the t-distribution based on the degrees of freedom and desired confidence level. If the population variances are known, the appropriate value is the standard normal distribution.

The Margin of Error in the Confidence Interval for the Difference