The American Society for Quality (ASQ) conducted a salary survey of all its members. ASQ members work in all areas of manufacturing and service- related institutions, with a common theme of an interest in quality. Manager and quality engineer were the most frequently reported job titles among the valid responses. Master Black Belt, a person who takes a leadership role as the keeper of the Six Sigma process ( see Section 14.6) and Green Belt, someone who works on Six Sigma projects part time, were among the other job titles cited. Descriptive statistics concerning salaries for these four titles are given in the following table:

Compare the salaries of Green Belts, managers, quality engineers, and Master Black Belts.

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Sample Standard Job Title Size Minimum Maximum Deviation Mean Median Green 39 45,000 140,000 21,272 73045 67045 Belt Manager 1517 27,000 306,000 28,700 92.740 90,000 Quality 964 29,00 180,000 21,793 79621 77,000 Engineer Master 75 58,000 200,000 32.328 119,274 116.750 Black Bdlt