Difference Between Two Means Population means, Goal:Test hypothesis or form independent a confidence interval for the samples difference between two population means,.μ1-μ2 o1 and o2 known The point estimate for the o,and o2 unknown difference is X1-X2 Statistics for Managers Using Microsoft Excel Chap9-6 Statistics for Managers Using Microsoft Excel Chap 9-6 Difference Between Two Means Population means, independent samples σ1 and σ2 known σ1 and σ2 unknown Goal: Test hypothesis or form a confidence interval for the difference between two population means, μ1 – μ2 The point estimate for the difference is X1 – X2