1. What is the name of chart that plots the standard deviation in a sub-group?
a. S chart
b. Moving average chart
c. R-chart
d. X-bar chart
2. Using the box cox transformation formula, if the original value x=3 and ^=2 what is the resulting transformed value?
a. 9
b. 8
c. 2/3
d. 1.5
3. Which of the following are true statements?
a. Cp or Pp takes into the account centering
b. Cpk or Ppk takes into account centering
c. Cp or Pp takes into the account dispersion
d. Cpk or Ppk is always a positive number
4. Which type of data is defined as "anything that can be classified as either/or?
a. Variable
b. Attribute
c. Distributed
d. Irrefutable
5. The Central Limit Theorem states that the distribution of the sample means approaches normal?
a. Only when the parent population is normal
b. Only when the parent population is lognormal
c. Regardless of the shape of the parent population
d. Only when the number of samples gets greater than 100
6. A run chart can reveal?
a. Points out of control
b. Shifts
c. Trends
d. B and C only
7. What is the only variable that determines the width of the control limits of the averages portion of the x-bar, R-chart?
a. D4
b. R-bar
c. A2
d. None of the above
8. Which of the following are true statements?
a. Cp or Pp takes into account centering
b. Cpk or Ppk takes into account centering
c. Cp or Pp takes into account dispersion
d. Cpk or Ppk is always a positive number
e. These could be a mixture of answers
9. Which of the following statements are true?
a. Shifts, trends and points can be determined on the range portion of an x-bar, r control chart
b. Specifications should be drawn on a control chart so that bad products can be detected
c. An x-bar, R chart is the best choice to use when one doesn't have rational sub groups to use
d. None of the above
10. Pre-control charting uses which of the following to determine process goodness?
a. Standard deviation
b. Range values
c. Specifications
d. None of the above
11. A Cp of 0.70 means?
a. The process is out of control
b. Specifications are 70% of the process
c. The process is acceptable
d. All of the above
12. A trend in control charting is typically described as?
a. 7 points in a row either above or below the center line
b. 7 points in a row in either an upward or downward direction
c. 7 points in a row that are beyond the control limits
d. 7 data points in a subgroup
13. A trend is
a. 7 points in a row below the center line
b. 7 points in a row above the center line
c. 7 points in a row in zone A
d. None of the above
14. According to six sigma philosophy?
a. Cp or Pp and Cpk or Ppk should be greater than 1.33
b. Cp or Pp and Cpk or Ppk should be greater than 1.50
c. Standard deviation is greater than 6
d. Standard deviation is less than 6
15. The process mean over time is normally expected to drive?
a. About 1.5 standard deviation
b. About 6 standard deviation
c. About 6 units of measure
d. Toward the upper specification limit
16. Process characterization's purpose is?
a. To map the process to show "as is" state
b. To map the process to show "should be" state
c. To provide objective evidence that all product and process perameters are in specification
d. To provide objective evidence that critical product parameters and associated product parameters are consistently capable of meeting customer requirements