Class 1Final Class2Final Assignment Class1 Midterm 28.75 24.05 15 11 61.25 50.05 15 28 42.5 35.05 13 19 53.75 44.05 20 26 53.75 44.05 20 22 36.25 30.05 18 13 38.75 32.05 20 10 37.5 31.05 10 11 45 37.05 13 16 41.25 34.05 16 15 48.75 40.05 19 16 41.25 34.05 20 16 30 25.05 10 12 45 37.05 12 22 36.25 30.05 10 13 53.75 44.05 15 23 62.5 51.05 12 28 50 41.05 14 20 52.5 43.05 11 20 43.75 36.05 13 15 38.75 32.05 15 10 60 49.05 19 30 52.5 43.05 13 16 46.25 38.05 13 24 50 41.05 18 20 37.5 31.05 10 16 31.25 26.05 20 10 41.25 34.05 11 18 37.5 31.05 12 13 31.25 26.05 14 15 Var=80.55 Var=55.29 z-Test: Two Sample for Means Mean Known Variance Observations Hypothesized Mean Difference z P(Z<=z) one-tail z Critical one-tail P(Z<=z) two-tail z Critical two-tail Class 1Final Class2Final 44.291666667 36.483333333 100 100 30 30 0 3.0241544962 0.0012466454 1.644853627 0.0024932908 1.9599639845