1. Determine whether the population means of two independent groups differ. Explain further.

2. Calculate a range of values that is likely to include the difference between the population means. Explain further.

Two-Sample T-Test and Cl: ... v X HOSPITALCOMPARISON.MTW Two-Sample T-Test and Cl: Rating, Hospital Method My: mean of Rating when Hospital = A Hz: mean of Rating when Hospital = B Difference: Hi - W: Equal variances are not assumed for this analysis. Descriptive Statistics: Rating Hospital N Mean StDev SE Mean A 20 80.30 8.18 1.8 B 20 59.3 12.4 2.8 Estimation for Difference 95% Cl for Difference Difference 21.00 (14.22, 27.78) Test Null hypothesis Ho: Hi - Hz = 0 Alternative hypothesis H1: 1 - = = 0 T-Value DF P-Value 6.31 32 0.000