Statistical Quality Control Mock Test 8

10%

Question 1 of 10

1. What is K called in the expressions of the one-sided Cusums?

Resultant value

Related value

Regarded value

Reference value

Question 1 of 10

Question 2 of 10

2. How is the effectiveness of EWMA charts by inertia effect?

Decrease

No change

Increase

Can either decrease or increase

Question 2 of 10

Question 3 of 10

3. If the value of μ₀ > μ₁, K will have a negative value.

False

True

Question 3 of 10

Question 4 of 10

4. Which of these is not an advantage of using a Shewhart control chart with the EWMA chart?

ARL adjustment

Detection of larger process shifts

No defects

Counteraction to the high signal resistance value

Question 4 of 10

Question 5 of 10

5. What is the standardized variable value for the cusum charts from Hawkins?

\(v_i=\frac{3\sqrt{|y_i|}-0.822}{0.349}\)

\(v_i=\frac{\sqrt{|y_i|}-0.822}{0.349}\)

\(v_i=\frac{2\sqrt{|y_i|}-0.822}{0.349}\)

\(v_i=\frac{\sqrt{|y_i|}-0.822}{0.500}\)

Question 5 of 10

Question 6 of 10

6. Which of these values of λ gives the weights given to current and previous observations matching as closely as possible the weights when these observations give by a Shewhart chart with the WE rules?

0.9

0.7

0.4

0.2

Question 6 of 10

Question 7 of 10

7. 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.

Signal resistance

ARL

Signal resolution

UCL

Question 7 of 10

Question 8 of 10

8. What is the value of L=2.27 upper control limit for a EWMA chart which has value of λ=0.10 and the value of the standard deviation σ=1 and the value of μ₀=10?

10.10

10.27

10.41

9.59

Question 8 of 10

Question 9 of 10

9. The EWMA charts are recommended for phase II applications as it is totally a nonparametric procedure.

False

True

Question 9 of 10

Question 10 of 10

10. What is the starting value of the EWMA?

Process target standard deviation

Process target mean

Zero

Process target variance

Question 10 of 10