1. The square root of the sum of x minus x-bar squared divided by n-1 is

a. Standard deviation of a population

b. Standard error

c. Standard deviation of a sample

d. Variance

2. Rational subgrouping primarily involves

a. Establishing time sequence for sampling and sample size

b. Keeping subgroup size 2

c. Maximizing the homogeneity WITHIN the subgroup

d. Minimizes the variation BETWEEN subgroups

3. You have been tasked with implementing a measurement system and want to be sure it is as accurate as possible. To test the measurement system, a team member is tasked with measuring one unit from the process three times with the same measuring device, The next day, the same team member measures a different unit three times with the same device. Both times, the consistency between the three readings for each unit is checked. Which describes your method for evaluating the measurement system?

a. Accuracy

b. Reproducibility

c. Normality

d. Repeatability

4. The more one adjusts the process to nominal 

a. The more they decrease variation

b. The more they increase variation

c. The more they assured quality

d. None of the above

5. If the project Earned Value equals $500, the project Actual Cost is $300, and the project Planned value is $600, what is the cost variance?

a. $200

b. $100

c. $300

d. None of the above

6. A subset of the population selected to help make inferences on a population is called

a. Critical value

b. Test statistic

c. Sample

d. Population parameter

7. You ask three (3) inspectors to measure a part to determine if they come up with the same measurements. This is an example of 

a. Repeatability

b. Calibration

c. Detection

d. Reproducibility

8. To exploit a capacity constrained resource, which tool(s) might you use?

a. Check sheet

b. 5-why methodology

c. Cause-Effect Diagram

d. All of the above

9. The manager is asked to provide Cpk data for a specific parameter that is shown to be in control and predictable. The Cpk data for a weekly sample of 30 in each of the first six is 1.65, 1.58, 1.67, 1.59, 1.68 and 1.71. Your reaction is 

a. Revise how the samples are collected for better repeatability

b. Reduce the frequency of Cpk monitoring

c. Increase the frequency of Cpk monitoring

d. Initiate an immediate corrective action request

10. Which of the following would be most influenced if there was an extreme data outlier in the sample?

a. Mode

b. Median

c. Mean

d. Significance level