1. A process is stable and has a proportion defective of 0.025. What would be the upper control limit on the p-chart for a periodic sample of 100 units?

• 0.038
• 0.072
• 0.095
• 0.104

2. One of the purposes of randomization in experimental design is to avoid any bias from latent potential factors.

True

False

3. Main effects and interaction plots show the statistical significance of the effect or interaction.

True

False