Concept explainers
Draft Lottery When the draft lottery for military service in the Vietnam War was conducted, officials “randomly” selected birthdays. For example, September 14 was selected first, and that date was assigned the rank of 1. If March 7 were selected second, it would be assigned the rank of 2. This meant that all eligible men with birthdays on September 14 were drafted first, and men with birthdays on March 7 were selected next. If the birthdays were selected truly at random, the
a. Which month had the smallest mean?
b. Test the hypothesis that the population means are equal for all twelve months. Show all four steps for ANOVA. Do not do post hoc comparisons. Use a significance level of 0.05.

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Chapter 11 Solutions
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