2.5 TWO QUANTITATIVE VARIABLES: LINEAR REGRESSION

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Last updated 3:51 AM on 10/1/26
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4 Terms

1
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what is least squares regression line?

When we know, based on the value of the correla- tion, r, that we have a relatively strong linear association between two variables, we can use the Least Squares Regression Line method to find the equation of a line of best fit for the data.

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what is true about a strong linear fit line?

Even a strong linear fit does not (necessarily) imply a cause/effect relationship.

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what is important to remember

ALWAYS PLOT YOUR DATA and CONSIDER THE CONTEXT!!!!!

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what are facts about the least squares regression line?

• There are several methods available for finding a regression line of best fit. We are using the least squares method.

• The least squares regression line minimizes the sum of the squared residuals.

• The least squares regression equation allows us to predict values of the response