In MATLAB

• Use anonymous functions to compute Sxx and Sxy
• x = [161, 203, 235, 176, 201, 188, 228, 211, 191, 178];
• y = [159, 206, 241, 163, 197, 193, 209, 189, 169, 201];
• Plot the data (circles, no connecting lines)
• Also plot the line (no points need printing, line only) yhat = b0 + b1*x where
  • b1 = Sxy/Sxx
  • b0 = Avg(y)-b1*avg(x)
• Obtain errors = yhat-y
• Obtain the sum of squares of errors and print labelled as SSE
• Use functions such as sum and mean to help
• Publish in the usual way
• OTHER HINTS
  • The number of components in x or y can be obtained using length(x) or length(y)
  • The average of x can be obtained using mean(x), same for y using mean(y)
  • The array yhat uses the x array to make a prediction for each value of y. As shown above once you have b0 andb1 (both scalars) yhat = b0 + b1*x.
  • The large formulas involving sigmas: the symbols represent summation of the terms.
• formula for Sxx and Syy is sum(v.^2)-length(v)*mean(v), v being the variable