CertifQ

OPTIONS Standard errors of coefficients go high Statistical accuracy goes down Variance of the Regression model increases Regression model is unstable ANSWER Variance of the Regression model increases EXPLANATION A model having a high VIF will always show slightly higher variance, which is a skewed...

OPTIONS Since VIF > 0, the variables are collinear Since VIF < 5, variables being collinear is not much of an issue High degree of collinearity amongst variables None of the above ANSWER Since VIF < 5, variables being collinear is not much of an...

OPTIONS That the data may be incorrect That the data may suffer from a lack of fit That the data may be an effect of special cause variability That the data needs treatment ANSWER That the data may be an effect of special cause variability...

OPTIONS Checks how well the data can be predicted Checks the accuracy of residuals Checks the fit of residuals Checks the presence of auto-correlation between residuals ANSWER Checks the presence of auto-correlation between residuals EXPLANATION Durbin Watson statistic checks for auto correlation.

i) Central Tendency ii) Shape iii) Location iv) Variability OPTIONS i) and ii) ii) and iii) i) and iii) i) and iv) ANSWER i and iii EXPLANATION At all times, the Box Plot will be able to indicate Central Tendency, i.e. median and the variability,...

OPTIONS Coded Dummy Response KPI ANSWER Response EXPLANATION Response is the technical and operational term for an output variable.

OPTIONS Mallows Cp Durbin Watson Statistic Lack of Fit Statistic PRESS Statistic ANSWER Mallows Cp EXPLANATION Mallows Cp is the term used for this purpose.

OPTIONS Clustering Probability Stratified Systematic ANSWER Stratified EXPLANATION As you can see the Box Plot clearly shows the entire data has been separately collected for each groups, clearly indicating stratification, so STRATIFIED is correct.

OPTIONS If the cause happens due to another cause If the cause happens regularly If the cause is measurable If the cause is the root cause ANSWER If the cause is measurable EXPLANATION Six Sigma being a statistical approach, the Black Belt should at all...

OPTIONS Pareto Charts Brainstorming 5 WHY Correlation ANSWER 5 WHY EXPLANATION 5 WHY is a simple and powerful Root cause Analysis technique.