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Some parts manufactured in an injection molding process are subjected to a certain compressive strength test. 22 samples are taken as shown in the following
Some parts manufactured in an injection molding process are subjected to a certain compressive strength test. 22 samples are taken as shown in the following table which shows the compressive strengths (in psi). Assume that you want to analyze using an xbar-s charts. q-) (4 points) If the quality characteristic is normally distributed and if the specifications are 36040, what is upper process capability (Cpu) be)? (use 2 decimals) r-) (6 points) If the quality characteristic is normally distributed and if the specifications are 36040, what is the actual process capability (Cpk) be)? (use 2 decimals) s-) (6 points) According to the calculated process capability ratio values above, what percentage of the specification band is used up by the process? (use 2 decimals) t) (4 points) If the 3 sigma control limits are replaced with 2 sigma limits, What is the LCL for the new X control chart (based on the original data)? (use 2 decimals)
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