In a study of 2005, Math SAT scores, the Educational Testing Service computed the average score for each of the 51 states, and the percentage of high-school seniors in that state who took the test.
In a study of 2005, Math SAT scores, the Educational Testing Service
computed the average score for each of the 51 states, and the percentage of high-school seniors in that state who took the test. The correlation between these two variables was equal to -0.84. (a) True or False: test scores tend to be lower in the states where a higher percentage of the students take the test. If true, how do you explain this? If false, what accounts for the negative correlation?
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