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Mathematics, 31.03.2020 00:59, HopeDied
Each year, students in an elementary school take a standardized math test at the end of the school year. For a class of fourth-graders, the average score was 55.1 with a standard deviation of 12.3. In the third grade, these same students had an average score of 61.7 with a standard deviation of 14.0. The correlation between the two sets of scores is r = 0.95 . Calculate the equation of the least-squares regression line for predicting a fourth-grade score from a third-grade score.
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