Problem 5. NOTE: An oven has a target of 90 + Only four samples could be taken with measurements of: 89, 92, 89, and degrees. Find the following: 2 degrees. RR:

91 Cp: Cpk HINT: Use the Moving Range Method USE EXTENDED SHEWHART COEFFICIENTS CHART FOR n >20 USE CORRECT CASE (UPPER/LOWER) WHEN YOU LOOK UP THE COEFFICIENT!!! %