Conduct a multiple comparison of means by Tukey’s method to determine exactly where the significant differences occur in Problem 23.

Data From Problem 23

Consider an experiment to determine the effects of alcohol and marijuana on driving. Five randomly selected subjects are given alcohol to produce legal drunkenness and then are  given a simulated driving test (scored from a top score of 10 to a bottom score of 0). Five  different randomly selected subjects are given marijuana and then the same driving test. Finally, a control group of five subjects is tested for driving while sober. Given the following driving test scores, test for the significance of differences among means of the following  groups:

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Alcohol 3 4 1 1 3 Drugs 1 6 4 4 3 Control 8 78568 8 5 6