Marvin is interested in whether blonds, brunets, and redheads differ with respect to their extrovertedness. He randomly samples 18 men from his local college campus: six blonds, six brunets, and six redheads. He then administers a measure of social extroversion to each individual.

1. Conduct a one-way ANOVA to investigate the relationship between hair color and social extroversion. Be sure to conduct appropriate post hoc tests. On the output, identify the following:
   1. F ratio for the group effect
   2. Sums of squares for the hair color effect
   3. Mean for redheads
   4. p value for the hair color effect
2. What is the effect size for the overall effect of hair color on extroversion?
3. Create a boxplot to display the differences among the distributions for the three hair color groups.

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