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Business Management: A laser eye surgery process has tolerances of plus or minus 0.0020 inches. What does the process standard deviation need to be in
Business Management: A laser eye surgery process has tolerances of plus or minus 0.0020 inches. What does the process standard deviation need to be in order for this process to have a capability ratio of 1.500? The answer key says it's .0.00044444 inches, but I don't understand how the answer is calculated
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