Which statement(s) are correct about the Factorial Plot shown here? (Note: There are 3 correct answers).
Which statement(s) are correct about the Factorial Plot shown here? (Note: There are 3 correct answers).
When the cutting speed increased from low to high level, the tool age increases. This can be observed from the plot where the tool age values at higher cutting speeds are higher compared to the lower cutting speeds. The coefficient of the metal hardness is positively related to the output of tool age, which is evident as the metal hardness values increase, the tool age also increases. The coded coefficient is lower for cutting speed than the cutting angle related to the output of tool age, which can be understood by comparing the slopes or differences in means between changing levels of cutting speed and cutting angle.
Easy way to remember the answers: Instead of memorizing ABC, focus on the incorrect answers because they are easier to spot. For Option E: Interaction Plots are where straight lines are drawn in the middle of the graph with Y and X axis. For option D: There is no way to tell confidence level, by just looking at the cube. I don't think there is such a thing called "Confidence Levels" with Cube-Plots.