6.19 Consider the data in Exercise 6.17. Suppose we wish to define a new inspection unit of four tape decks. What are the center line and control limits for a control chart for monitoring future production based on the total number of defects in the new inspection unit? b. What are the center line and control limits for a control chart for nonconformities per unit used to monitor future production? Table 6E.11 Data for Exercise 6.17 Deck Number Number of Nonconformities Deck Number of Number Nonconformities 2412 0 2421 1 2413 1 2422 0 2414 1 2423 3 3 2415 0 2424 2 (Continued) Table 6E.11 Continued Deck Number of Number Nonconformities Deck Number Number of Nonconformities 2416 2 2425 5 2417 1 2426 1 2418 1 2427 2 2419 3 2428 1 2420 2 2429 1