MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Statistical Quality Control knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The EWMA charts are recommended for phase II applications as it is totally a nonparametric procedure. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
The signal resistance value depends on the value chosen for . |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
In the case of Shewhart charts, if the data is not according to the normal distribution, the actual in-control ARL (ARL0) will be ____________ the expected value. |
| A. | Considerably higher than |
| B. | Considerably lower than |
| C. | Equal to |
| D. | Almost equal to |
| Answer» C. Equal to | |
| 4. |
Which of these is not an advantage of low value of in the case of EWMA charts? |
| A. | Good ARL performance |
| B. | Insensitivity to the normality of the data |
| C. | Good ability to detect the larger process shifts |
| D. | Easy detection of small process shifts |
| Answer» E. | |
| 5. |
Which of these is not an advantage of using a Shewhart control chart with the EWMA chart? |
| A. | Detection of larger process shifts |
| B. | ARL adjustment |
| C. | Counteraction to the high signal resistance value |
| D. | No defects |
| Answer» E. | |
| 6. |
Who were the first persons to recommend the use of Shewhart control charts with the EWMA charts with low values of ? |
| A. | Woodall and Mahmoud |
| B. | Woodall and Roberts |
| C. | Roberts and Mahmoud |
| D. | Roberts and Crowder |
| Answer» B. Woodall and Roberts | |
| 7. |
Which of these methods can be used to counteract the signal resistance in case of small values of with EWMA charts? |
| A. | To use a cusum chart paralleled |
| B. | To use a Shewhart control chart paralleled |
| C. | To just wait for EWMA chart to be plotted till 50 observations |
| D. | To increase the value of process mean target |
| Answer» C. To just wait for EWMA chart to be plotted till 50 observations | |
| 8. |
Small values of gives ______ values of the SR (EWMA). |
| A. | Larger |
| B. | Lower |
| C. | Equal |
| D. | Both, larger and smaller |
| Answer» B. Lower | |
| 9. |
Which of these is the maximum value of the SR averaged over all values of EWMA statistic? |
| A. | (SR_{max} (EWMA)=L frac{(2- )}{ } ) |
| B. | (SR_{max}(EWMA)=L sqrt{ frac{(2- )}{ }} ) |
| C. | (SR_{max} (EWMA)=L+ sqrt{ frac{(2- )}{ }} ) |
| D. | (SR_{max} (EWMA)=L- sqrt{ frac{(2- )}{ }} ) |
| Answer» C. (SR_{max} (EWMA)=L+ sqrt{ frac{(2- )}{ }} ) | |
| 10. |
What is the value of the term w called in the SR value of a EWMA chart? |
| A. | First EWMA value |
| B. | Last EWMA value |
| C. | Value of EWMA statistic |
| D. | Weight average |
| Answer» D. Weight average | |
| 11. |
What is the value of SR for an EWMA chart? |
| A. | SR(EWMA)= ( frac{L sqrt{ frac{ }{2- }}+( -1)w}{ } ) |
| B. | SR(EWMA)= ( frac{L sqrt{ frac{ }{2- }}-(1- )w}{ } ) |
| C. | SR(EWMA)= ( frac{L sqrt{ frac{ }{2- }}-( -1)w}{ } ) |
| D. | SR(EWMA)= ( frac{L sqrt{ frac{ }{2- }}+(1- )w}{ } ) |
| Answer» C. SR(EWMA)= ( frac{L sqrt{ frac{ }{2- }}-( -1)w}{ } ) | |
| 12. |
Which of these is not having a constant SR value? |
| A. | c-chart |
| B. | R-chart |
| C. | p-chart |
| D. | EWMA chart |
| Answer» E. | |
| 13. |
Which of these is a having a constant SR? |
| A. | A chart |
| B. | A Cusum chart |
| C. | An EWMA chart |
| D. | Every control chart |
| Answer» B. A Cusum chart | |
| 14. |
For a Shewhart control chart, what is the value of SR? |
| A. | Z<sub> /2</sub> |
| B. | 2 |
| C. | L |
| D. | 2L |
| Answer» D. 2L | |
| 15. |
The largest standard deviation of the sample mean from the target, not leading to an immediate out-of-control signal, is called _______________ of a control chart. |
| A. | ARL |
| B. | UCL |
| C. | Signal resolution |
| D. | Signal resistance |
| Answer» E. | |