Question: how to calculate sxy in statistics?
Answer: Sxy = (134 - 4 * 5.0 * 5.0 ) / ( n - 1) = 34 / 3 = 11.33. The slope of the regression line is b1 = Sxy / Sx^2, or b1 = 11.33 / 14 = 0.809. Thus the equation of the least squares line is yhat = 0.95 + 0.809 x.