Sample 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. Size 40 40 40 40 40 40 40 40 40 40 40 40 40 Tread Wear 12 10 14 2 4 6 16 5 4 8 17 16 23 14 16 12 5 4 8 13 4 6 14. 40 The Traffic Safety Department (TSD) independently tests over 2,400 types of tires annually. In 2020, they issued over 900 recalls, affecting 51 million vehicles nationwide. Obviously, tire failure is a leading cause of accidents, injury, and death. The cost of poor quality can be in the hundreds of millions of dollars to the tire manufacturer due to lawsuits, liability claims, and the cost of recalls to fix the problem. Your safety depends on a high level of tire quality and performance. Therefore, the Goodman Tire and Rubber Company periodically tests its tires for tread wear under simulated road conditions. To study and control its manufacturing processes, the company uses P Chart Twenty samples, each containing 40 radial tires, were chosen from different shifts over several days of operation. Case Questions 1. Construct P charts for these data and illustrate (draw) the graph. 40 40 40 15. 16. 17. 18. 19. 20. 21. 22 23 24. 25. 40 40 40 40 40 40 40 40 +-+ 5 4 2. Comment on graph concerning if the production process in control or out of control