A control valve needs to be very sensitive to the input voltage, thus generating a good output

Question:

A control valve needs to be very sensitive to the input voltage, thus generating a good output voltage. An engineer turns the control bolts to change the input voltage. In the book SN-Ratio for the Quality Evaluation published by the Japanese Standards Association (1988), a study 011 how these three factors (relative position of control bolts, control range of bolts, and input voltage) affect the sensitivity of a control valve was conducted. The factors and their levels are shown below. The data show the sensitivity of a control valve. Factor A: Relative position of control bolts: center -0.5, center, and center +0.5 Factor B: Control range of bolts: 2, 4.5, and 7 (mm) Factor C: Input voltage: 100, 120, and 150 (V). Perform an analysis of variance with ? = 0.05 to test for significant main and interaction effects. Draw conclusions.