Find the equation of the least squares regression line if x-bar= 15 sx=2 y-bar = 17.1 sy=3 r= 0.2

Find the least squares regression line if xbar = 3 ,sx= 3.2 ,ybar=2 ,sy=1.7 ,r=-0.7

Answer

Slope of the regression line (b) = r*sy/sx = -0.7*1.7/3.2 = –0.371875 Intercept = ybar – b*xbar = 2 – (-0.371875)*3 = 3.115625 Hence, The regression line will be:

y = 3.115625 – 0.371875 x

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