Reference no: EM132851412

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"Time-Weighted - EWMA Control Chart - 1".

1. What is the full form of E in the EWMA chart?

a) Exponentially

b) Experimentally

c) Exactly

d) Estimated

2. What is the full form of EWMA?

a) Exponentially weighted moving average

b) Exponentially weighted measured approximate

c) Exponentially weighted moving approximate

d) Exponentially weighted measured average

3. EWMA charts are better than Shewhart control charts in detecting the ___________ shifts.

a) Large process

b) Medium process

c) Small process

d) Every process

4. Which of these is not an advantage of EWMA control charts?

a) Almost equivalent performance to the cusum charts

b) Easier set up than cusum charts

c) Easier to operate than cusum charts

d) Intricacy is a little higher than cusum charts

5. Who did first introduce the EWMA charts?

a) Lucas (1990)

b) Saccucci (1990)

c) Roberts (1959)

d) Crowder (1987a, 1989)

6. What is the correct expression for the EWMA?

a) zi = λxi + (1-λ) zi-1

b) zi = λxi - (1-λ) zi-1

c) zi = λxi + (1-λ) zi+1

d) zi = λxi + (1+λ) zi-1

7. Which of these is correct for λ in EWMA expression?

a) 0 > λ

b) 1 < λ

c) 1 ≤ λ

d) 0 < λ ≤ 1

8. What is the starting value of the EWMA?

a) Zero

b) Process target mean

c) Process target variance

d) Process target standard deviation

9. Which of these is another name of EWMA charts?

a) GMA charts

b) AMA charts

c) EMA charts

d) RMA charts

10. GMA stands for ___________

a) Geosum moved average

b) Geometric Moving average

c) Geometrically moved average

d) Geocentric moving average