Confidence Intervals are not only part of AP Statistics and College Statistics, but are now included in Algebra 2 under Common Core. This resource helps students understand and succeed in determining confidence intervals to estimate a population mean using a TI 84 Graphing Calculator. Full step by step directions, illustrated with screen shots, are given along with 3 examples. The three reference sheets include:Determining the z-interval from StatisticsDetermining the t-interval from Statistic