Question: 10. What are the two different ways in which the term six sigma is used? (Explain) 11. Population A: 48% male and 52% female and

10. What are the two different ways in which the term six sigma is used? (Explain) 11. Population A: 48% male and 52% female and both groups have similar interest in the preference for a policy of interest, that we are trying to measure. Population B: 30% over 60 years of age; 50% between 30-60 and 20% between 18-30. Over 60 has a more uniform preference for a policy of interest, 30-60 has some variation and 18-30 has wide variations in their preference. You are going to sample the populations to find a measure of interest in some characteristic. (example: preference for social policies). a. In which population you think stratified sampling will have maximum benefit? Why? b. Suppose you are sampling 100 people from population B, which sub-population will get disproportionately higher number of samples under stratified sampling? Why? 12. (5 points) Discuss the effect of changes in the sample size (increase and decrease) on average length (ARL) (will it go up or down or stay the same) And Discuss the effect of shifts in process mean on average length (ARL) (will it go up or down or stay the same)

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