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Students investigate the method of least squares by finding the residuals and the sum of the squares of the residuals.
Students use the data about life expectancies from the year 1900 to 2004 to create a scatter plot. They will investigate the method of least squares by finding a line of better fit and then using lists to calculate the sum of the squares.
Students are asked to compare their sum with a partner’s and then are given a set of questions that direct them to discover the principles of a regression line. Finally, they will compare their line and sum with the handheld’s regression line.
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