Lean Six Sigma Black Belt Quiz Questions and Answers

The six sigma philosophy which is used to improve the effectiveness of the process is_____.

Answer :
  • Reducing Variation

Explanation :

Reduction of variability is Six Sigma philosphy

In case of dispute, in Lean Culture, we must solve it in the favour of the following.

Answer :
  • End Customer

Explanation :

Lean is all about the end customer experience

We perform Kruskal Wallis test in case Y is non random. Which of the following test is substituted?

Answer :
  • One Way ANOVA

Explanation :

Failures of ANOVA is tested on Kruskal Wallis

Please conclude: Upon statistical analysis, p value suggests 0.032. What would be the action taken?

Answer :
  • Reject Ho & Accept Ha

Explanation :

Reject Ho & Accept Ha when p value < 0.05

Which one out of the following is NOT a tool to collect VOC for a Lean Six Sigma project implementation?

Answer :
  • Feedbacks

Explanation :

Rational Subgrouping is method of sampling

Martha does Sales Performance Evaluation of 5 of the managers to find the most appropriate candidate for promotion. Which statistical test would be appropriate?

Answer :
  • One Way ANOVA

Explanation :

Comparing average of more than 2 groups

Post research it was observed that Sales improved significantly with better lighting conditions (by increasing Lumens) in the shopping mall. Which of the following test can confirm the same?

Answer :
  • Correlation

Explanation :

X & Y numerical tested on correlation

During Gage Evaluation, the % study variation for Total Gage R& R was recorded as 19%, the repeatability as 2% and reproducibility as 13%. What problem do we have in the measurement system?

Answer :
  • Operator

Explanation :

% Study Variation < 10% is acceptable

Calculate sample size for a research work involving percentage of obese people in a city. We would like to be 95% confident with +/- 2% from the true population mean. Previous survey showed that 40% people fall in obese category.

Answer :
  • 2305

Explanation :

Use discrete formula for sample size

Every hour Amanda picks ups 1 sample each from 6 different machines which accounts for the total production. If she wants to use a control chart, which one she would pick?

Answer :
  • X-Bar R

Explanation :

Upto 8 subgroups we use X Bar R