question archive A researcher conducts an ANOVA to see if 3 different levels of gas octane affect the number of miles per gallon a car achieves
A researcher conducts an ANOVA to see if 3 different levels of gas octane affect the number of miles per gallon a car achieves
Subject:StatisticsPrice: Bought3
A researcher conducts an ANOVA to see if 3 different levels of gas octane affect the number of miles per gallon a car achieves. The omnibus ANOVA was significant with MSerror = 30.39. The mean gas millage for each octane level is provided below. Conduct Tukey's post-test to determine which groups differed from one another by: 1. stating all mean differences, 2. computing the HSD, and 3. stating which groups differ based on your test. Set alpha at .05. (5 points)
X1(High Octane):
Mean = 32mpg; n = 21
X2(Moderate Octane):
Mean = 28mpg; n = 21
X3(Low Octane):
Mean = 35mpg; n=21
