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Six Sigma Green Belt Questions 81–85 (page: 18)

For the data shown here a Belt suspects the three grades are supplying the same results.
Which statement(s) are true for proper Hypothesis Testing?

The higher the sigma level of a process the better the performance.

The Six Sigma methodology had its origins at __________________ in the late 1980's when William Smith coined the name for quality related work being done there.

Training cost is $4,000 and a project required an initial investment of $30,000. If the project yields monthly savings of $2,000 beginning after 3 months, what is the payback period in months (before money costs and taxes)?

Lean Six Sigma's general approach to solving significant challenges related to a process is called _________________.