ABSTRACT
Two sample tests are represented by the graphical method. The two sample variables are control and treatment for the component insulin in mcU/ml. The sum of squares is equal to each square four times with each sample under the null hypothesis. The parameter control is marked in the lower quadrant, and the parameter treatment is marked in the upper quadrant. The sum of the differences is represented in the graphical method, which has the factors model, error, total and sums of distances. The additivity property of the sum of squares has been exploited in many ways in statistics, and in mathematics in general. Bob is still unsure about the additivity property of sums of squares. Convince him by computing the sums of squares for the model and the error, and show that they add up to the total sum of squares.
