HW3 - Florian Mettetal Stat252-03 S. Rein HW #3...

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Florian Mettetal Stat252-03 S. Rein HW #3 10:43,45,49,50 10.43 Two-sample T for After vs Before N Mean StDev SE Mean After 12 48.17 2.12 0.61 Before 12 45.33 2.46 0.71 Difference = mu (After) - mu (Before) Estimate for difference: 2.833 95% CI for difference: (0.881, 4.786) T-Test of difference = 0 (vs not =): T-Value = 3.02 P-Value = 0.007 DF = 21 With a significance value of 0.05, and a P-value of 0.007 we must reject the null hypothesis that the work output of the production outline has not changed since the line being modified. 10.45 Paired T for MPG:AA - MPG: NA N Mean StDev SE Mean MPG:AA 10 22.44 4.83 1.53 MPG: NA 10 21.91 5.32 1.68 Difference 10 0.530 1.011 0.320 95% CI for mean difference: (-0.193, 1.253) T-Test of mean difference = 0 (vs not = 0): T-Value = 1.66 P-Value = 0.132 a. The same drivers and same cars were necessary to see if the acetone improved the avg MPG of any car. Different styles of driving and different cars effect the MPG and creating these variables to the study would have significantly reduced the possibility for
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HW3 - Florian Mettetal Stat252-03 S. Rein HW #3...

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