Move the points so that they are in three separated groups.[br]How do the points appear when n = 1 and they are projected to PC1, PC2, or PC3? [br]
What is the variance and Explained variance ratio when points are projected onto PC1, PC2, and PC3? [br]
Switch the number of principal components to 2.[br]Which combination of two principal components best preserves the three groups?
What does the explained variance ratio seem to indicate about the projected points?