73/150 A manufacturer of safety hats is concerned about the Mean and the Variation of the forces its helmets transmit to wearers when subjected to an external force. The manufacturer has designed the helmets so the Mean force transmitted by the helmets to the workers is 800 pounds (or less) with a Standard Deviation to be less than 40 pounds. Variance tests were run on a random sample of n = 41 helmets and the sample Mean and sample Standard Deviation were found to be 825 pounds and 50 pounds respectively. The data provides sufficient evidence, at the a = 0.05 level, to conclude the population Standard Deviation exceeds 40 pounds. Tip: Calculate the Chi Square test statistic and use the Chi Square table to determine the P-value. A TRUE B FALSE42/150 Which one of the following is a criterion for the acceptance of a Measurement System? A The calculated R&R should be less than 10% of process variation B The calculated R&R should be less than 10% of process tolerances C The calculated discrimination should be more than 8 or 10% D Each of these is correct44 /150 You are studying a coating process with a customer requirement of 70 mm +/- 25 mm. You collect the following sequence of 10 data points when measuring the coating thickness. 80, 90, 56, 72, 80, 80, 92, 55, 50, 75. What can you conclude about the process stability from the data? A Process is stable B Process is unstable C Should gather more data before making a conclusion D Process is Capable F Process is not Capable