You start by collecting a list observations or data, and recording them in your spreadsheet. due to other factors (age, years on job, etc.) error i = portion of Y (salary) that is unrelated to X (education), i.e.X i = value of X (education) for observation i.the average increase in salary for each additional year of education b = average change in Y (salary) given a one unit increase in X (education), i.e.a = average value of Y (salary) when X (education) is zero.Y i = value of Y (salary) for observation i.Suppose you want to determine whether a person’s salary is a function of his or her education level (measured in years). ![]() ![]() ![]() A linear regression is just a statistical tool used to determine whether or not two (or more) variables are linearly related.īefore you can perform a linear regression with Excel, you need to make sure the “Analysis ToolPak” is installed.
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