Lean Six Sigma Green Belt Sample Paper 2: Background 1. What is the relationship between standard deviation and variance? Variance is the square root of standard deviation Standard deviation is the square of variance Standard deviation and variance have the same units as that of the dataset None of the above2. If the data has no extreme values, then the best measure of central tendency is Mean Moving range Median IQR3. Six Sigma is referred to as: A statistical approach to problem solving 3.4 defects per million opportunities A methodology, management system All the above4. One of the following is NOT a lagging indicator Topline Profit after tax On-going Six Sigma projects EBITDA5. Specification limit can be given by: Customers Regulatory bodies Research & Development teams All the above6. The appropriate graphical tools for displaying frequency distribution of discrete data are: Pareto plot, Bar graph Histogram, Bar graph Pareto plot, Histogram Histogram, Scatter plot7. As sigma ___________, sigma level_________ and DPMO __________. Increases, decreases, decreases decreases, decreases, increases decreases, decreases, decreases None of the above8. Six Sigma level corresponds to: 0.0034 defects per billion opportunities 3.4 defects per million opportunities 3.4 parts per million All the above9. It normally takes me 30-40 minutes to commute to office daily. Note that it does not take me exactly 35 minutes each time because there is attribution of _______ variation. Special cause Common cause Root cause None of the above10. In ___________ sampling there is high homogeneity within groups and high heterogeneity between groups. Stratified Sampling Random Sampling Systematic Sampling Cluster Sampling11. _________ credited as the father of Six Sigma: Mikel Harry Bill Smith Bob Galvin Larry Bossidy12. __________ is used when the improvement made with ___________ are not enough: DMAIC, DMADV DMADV, IDOV IDOV, DMAIC DMADV, DMAIC13. With respect to a Box plot, one of the following statements is TRUE Boxplot displays the mean, Q3 and Q1 of the data set The median will also be the mean, for a data that follows perfect normal distribution The higher the variation the smaller is the Inter-quartile range The median will always be in the center of the box14. What is the area contained within ± 3 standard deviation of a normal curve? 68.26 % 95.46 % 99.73 % 50 %