Solution for QID #22142: A researcher conducts an ANOVA to see if 3 different levels | StudyHelpMe

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