This lesson explains what a confidence interval is and explains how to construct and interpret confidence intervals. Includes sample problem with solution.
http://stattrek.com/estimation/confidence-interval.aspx
* confidence interval * parameter * parameter * random variable * confidence level * how to compute the margin of error * how to compute the margin of error * Learn more * Sample Planning Wizard * Register Now * View Demo * how to compute the margin of error * t score * degrees of freedom * cumulative probability * t Distribution Calculator * z score