Table 10.2.1 gives mean SAT scores for math by state for 1989 and 1999 for 20 randomly selected states (source: The World Almanac and Book of Facts 2000).
Table 10.2.1

Using the ANOVA procedure, test that the mean SAT score for math in 1999 is greater than that in 1989 at α = 0.05. Assume that the variances are equal and the samples come from a normal distribution.

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1989 Connecticut Indiana 5 Washington 9 North Carolina New Hampshire