Question: Problem 4 An operator - instrument combination is known to test parts with an average error of zero; however, the standard deviation of measurement error

Problem 4
An operator-instrument combination is known to test parts with an average error of zero; however, the standard deviation of measurement error is estimated to be 3. Samples from a controlled process were analyzed, and the total variability was estimated to be 5.
a. What is the true process standard deviation?
b. If specifications on the part are at 10015, find the P/T ratio for this gauge. What do you conclude?
C. Is the following process: precise? If not, what would you recommend? is it accurate? if not, what would you recommend?

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