Six Sigma Session 5 Quiz

2. Which of the following is NOT a reason to use continuous (variable) data? A It provides a better measure of variation. B It is more convenient to describe the physical characteristics of items. C A greater number of statistical analysis tools can be applied. D There is less subjectivity involved.

B It is more convenient to describe the physical characteristics of items.

7.What is the primary purpose of a Histogram? A To calculate the standard deviation. B To visualize the distribution of data. C To display the number of intervals. D To display process stability. E To identify the root cause of variability.

B To visualize the distribution of data.

5. Of these measurements, which one is best described as an Indicator/Predictor? A Net profit margin. B Customer satisfaction rating. C Warranty returns. D Scrap rate of a key input process.

D Scrap rate of a key input process

4.Which of these measurements is taken from a continuous scale? A The percentage of babies born during the year that are boys. B The number of blades of grass in your yard. C Ratings from a Zagat restaurant survey book. D The air pressure of the left front tire of your vehicle. E Percentage of election votes for a given candidate.

D The air pressure of the left front tire of your vehicle.

1.A 'population' is defined as: A A number or measurement collected as a result of observation. B A measurable characteristic of a population. C A subset of a sample. D The complete set of individuals, objects, or measurements about which we wish to draw a conclusion. E none of the above

D The complete set of individuals, objects, or measurements about which we wish to draw a conclusion.

13.When data contains extreme values, which measure of central tendency should be used? A The range B The mode C The mean D The median E None of the above

D The median

8.A process improvement team is working on a project in the order entry area to improve order accuracy and reduce the cycle time. The team wants to analyze the variability in cycle time. What tool should be used? A Trend Chart B Pie chart C Benchmarking D Metrics E Histogram

E Histogram

14.Which of the following questions would best be answered using a box plot? A Is the current production cycle time fast enough to meet customer demand consistently? B Is there a correlation between the number of automobile collisions and the average distance traveled by automobiles in a given year? C How often are support service calls attributed to user error? D How does the staff turnover rate for a given year compare across four production plants? E How do a month of daily sales figures compare across five store locations?

E How do a month of daily sales figures compare across five store locations?

9.What is the characteristic of a distribution called that is the difference between the highest and lowest values of a sample data set? A Mean B Median C Location D Standard Deviation E Range

E Range

3.What is the theory of central tendency? A A theory that explains the distribution of data around a central value. B A statistical approach used to measure variability within a dataset. C A method for assessing the significance of outliers in a dataset. D A statistical technique used to analyze the relationship between two variables. E A theory that describes the pattern of data dispersion in a scatter plot.

A A theory that explains the distribution of data around a central value.

16. If you haven't already, build a Pareto Chart using this dataset to answer the following question: Which problem category only makes up for roughly 6% of lost revenue? A Late Arrival B Billing Error C No Show D Overtime E Unprofessional

A Late Arrival

15.The moving company, "Bust a Move," has been receiving negative reviews on a popular local platform over the course of one year. With a growing list of complaints, the owner is unsure what problems to prioritize. Build a Pareto Chart using this dataset to answer the following question: What is the cumulative percentage of lost revenue for the categories: Damaged Property, Unprofessional, and Overtime? A 32% B 52% C 73% D 82% E 90%

C 73%

10.A sample of 5 persons with hypertension underwent a special treatment program which resulted in the following reductions in systolic blood pressure for these persons: -5, 10, 20, 5, 10. The mean reduction in systolic blood pressure is A 10 B 9 C 8 D 40 E None of these

C 8

6.A team is sorting through error data from a shipping process and wants to develop priorities for action. What tool should the team use to analyze the data? A Process Mapping B Brainstorming C Pareto Chart D Corrective Action Matrix E Trend Chart

C Pareto Chart

11.A dataset of five different scores has a median of 12. If the highest score is increased by 3, the new median: A Will decrease B Will increase C Will stay the same D Cannot be determined without additional information E None of the above

C Will stay the same

12.A population has a mean of 50 and a variance of 0 (zero). What is the logical conclusion to be drawn from this information? A It is an error. B The population consists of 50 units. C There are no units in the population. D All units in the population have the same value of 50. E None of the above.

D All units in the population have the same value of 50.