EWMA Control Chart MCQs : This section focuses on the "EWMA Control Chart" in Statistical Quality Control. These Multiple Choice Questions (MCQs) should be practiced to improve the Statistical Quality Control skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
EWMA stands for?
A. exponentially widened moving average chart
B. exponentially weighted mean average chart
C. exponentially weighted moving average chart
D. exponentially weighted moving author chart
Question 2
The EWMA chart tracks the exponentially-weighted moving average of all prior sample means.
A. Yes
B. No
C. Can be yes or no
D. Can not say
Question 3
L is typically set at _______ to match other control charts
A. 1
B. 2
C. 3
D. 4
Question 4
EWMA charts are better than Shewhart control charts in detecting the ___________ shifts.
A. Large process
B. Medium process
C. Every process
D. Small process
Question 5
Who did first introduce the EWMA charts?
A. Lucas (1990)
B. Saccucci (1990)
C. Roberts (1959)
D. Crowder (1987a, 1989)
Question 6
How is the effectiveness of EWMA charts by inertia effect?
A. Increase
B. Decrease
C. No change
D. Can either decrease or increase
Question 7
Which of these is not having a constant SR value?
A. c-chart
B. R-chart
C. p-chart
D. EWMA chart
Question 8
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
Question 9
EWRMS chart plots __________ on the control chart.
A. Exponentially weighted root moving square error
B. Exponentially weighted root mean square error
C. Exponentially weighted root mean signal error
D. Exponentially weighted root moving signal error
Question 10
The EWMA chart is sensitive to small shifts in the process mean.
A. Yes
B. No
C. Can be yes or no
D. Can not say