What is the Regression Line?Date: 08/09/99 at 22:30:51 From: Alison Silva Subject: Regression Line I do not understand what "regression line" means in the following question: "Calculate the equation of the regression line of y on x, and plot the line on your diagram (a scatter diagram)." Date: 08/09/99 at 22:41:11 From: Doctor Tom Subject: Re: Regression Line The "regression line" is the equation for a line (usually of the form y = mx + b, where you determine the values of m and b) such that the line is "as close as possible" to passing through all the points. By "as close as possible" is usually meant the line that minimizes the sum of the squares of the errors in the y-direction. A good statistics book can illustrate how to do this; the Rice Virtual Lab in Statistics HyperStat pages on regression lines offer this method: http://www.ruf.rice.edu/~lane/hyperstat/A115370.html - Doctor Tom, The Math Forum http://mathforum.org/dr.math/ |
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