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 desired ARL is obtained by using the Siegmund s approximation. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
The value of K and H should be determined according to the ARL required for the corresponding cusum chart. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
Which of these is an expression for Siegmund s approximation? |
| A. | (ARL= frac{exp u2061(-2 b)+2 b-1}{2 ^2} ) |
| B. | (ARL= frac{exp u2061(-2 b)+2 b-1}{2 } ) |
| C. | (ARL= frac{exp u2061(-2 b)-2 b+1}{2 ^2} ) |
| D. | (ARL= frac{exp u2061(-2 b)-2 b-1}{2 ^2} ) |
| Answer» B. (ARL= frac{exp u2061(-2 b)+2 b-1}{2 } ) | |
| 4. |
What is the expression for the two sided cusum ARL? |
| A. | ( frac{1}{ARL}= frac{1}{2ARL^-}+ frac{1}{2ARL^+} ) |
| B. | ( frac{1}{ARL}= frac{1}{ARL^-} frac{1}{ARL^+} ) |
| C. | ( frac{1}{ARL}= frac{1}{2ARL^-}- frac{1}{2ARL^+} ) |
| D. | ( frac{1}{ARL}= frac{1}{ARL^-}+ frac{1}{ARL^+} ) |
| Answer» E. | |
| 5. |
What of these can be used as the decision interval for the tabular cusum charts? |
| A. | 2 |
| B. | 1 |
| C. | 5 |
| D. | 4 |
| Answer» D. 4 | |
| 6. |
Which of these following expressions can be used to calculate the estimate of mean of the process in the case of the tabular cusums when Ci > H? |
| A. | ( hat{ }= left { _0+K+ frac{C_i^-}{N^-} right } ) |
| B. | ( hat{ }= left { _0-K- frac{C_i^-}{N^-} right } ) |
| C. | ( hat{ }= left { _0-K+ frac{C_i^-}{N^-} right } ) |
| D. | ( hat{ }= left { _0+K- frac{C_i^-}{N^-} right } ) |
| Answer» C. ( hat{ }= left { _0-K+ frac{C_i^-}{N^-} right } ) | |
| 7. |
Which of these can be used to calculate the estimate of mean of the process in the case of the tabular cusums when Ci+ > H? |
| A. | ( hat{ }= left { _0-K+ frac{C_i^+}{N^+} right } ) |
| B. | ( hat{ }= left { _0+K+ frac{C_i^+}{N^+} right } ) |
| C. | ( hat{ }= left { _0+K- frac{C_i^+}{N^+} right } ) |
| D. | ( hat{ }= left { _0+K+ frac{C_i^-}{N^-} right } ) |
| Answer» C. ( hat{ }= left { _0+K- frac{C_i^+}{N^+} right } ) | |
| 8. |
Which of these control charts may accurately tell when the assignable cause has occurred? |
| A. | Cusum control charts |
| B. | p-charts |
| C. | c-charts |
| D. | x bar and s charts |
| Answer» B. p-charts | |
| 9. |
Which of these steps, is not carried out when the process becomes out-of-control when using the cusum control charts? |
| A. | Search for an assignable cause |
| B. | Taking corrective action |
| C. | Restarting the control chart from zero |
| D. | Continuing the control chart |
| Answer» E. | |
| 10. |
Which of these is true for the Minitab version of tabular cusum charts? |
| A. | (C_i^- 0 ) |
| B. | (C_i^- 9 ) |
| C. | (C_i^- 0 ) |
| D. | (C_i^- 5 ) |
| Answer» E. | |
| 11. |
In the Minitab version of the cusum control charts, which of these is used? |
| A. | (C_i^+=max u2061 left {0,x_i- _0+k+C_{i-1}^- right } ) |
| B. | (C_i^-=min u2061 left {0,x_i- _0+k+C_{i-1}^- right } ) |
| C. | (C_i^-=max u2061 left {0,x_i- _0-k+C_{i-1}^- right } ) |
| D. | (C_i^-=min u2061 left {0,x_i- _0-k-C_{i-1}^- right } ) |
| Answer» C. (C_i^-=max u2061 left {0,x_i- _0-k+C_{i-1}^- right } ) | |
| 12. |
What is analogous to the control limits as in Shewhart control charts, in the cusum status charts? |
| A. | The reference value |
| B. | The allowance value |
| C. | The value of the decision intervals |
| D. | The value of C<sub>i</sub><sup>+</sup> and C<sub>i</sub><sup> </sup> |
| Answer» D. The value of C<sub>i</sub><sup>+</sup> and C<sub>i</sub><sup> </sup> | |
| 13. |
Each vertical bar in cusum status chart represents __________ |
| A. | The value of C<sub>i</sub><sup>+</sup> and C<sub>i</sub><sup> </sup> |
| B. | The value of C<sub>i</sub><sup> </sup> |
| C. | The value of C<sub>i</sub><sup>+</sup> |
| D. | Neither the value of C<sub>i</sub><sup>+</sup> nor C<sub>i</sub><sup> </sup> |
| Answer» B. The value of C<sub>i</sub><sup> </sup> | |
| 14. |
Which of these is a correct statement for cusum status charts? |
| A. | A plot between C<sub>i</sub><sup>+</sup> or C<sub>i</sub><sup> </sup> and the sample number |
| B. | A plot between the C<sub>i</sub><sup>+</sup> or C<sub>i</sub><sup> </sup> and the sample mean |
| C. | A plot between the C<sub>i</sub><sup>+</sup> or C<sub>i</sub><sup> </sup> and the sample variance |
| D. | A plot between the C<sub>i</sub><sup>+</sup> or C<sub>i</sub><sup> </sup> and the sample standard deviation |
| Answer» B. A plot between the C<sub>i</sub><sup>+</sup> or C<sub>i</sub><sup> </sup> and the sample mean | |
| 15. |
What are the graphical displays of tabular cusum called? |
| A. | Cusum regular charts |
| B. | Cusum regulated display |
| C. | Cusum level display |
| D. | Cusum status charts |
| Answer» E. | |