1. Which of the following statements is not true about six-sigma quality?
A.six-sigma results in 3.4 ppm defects
B.six-sigma is equivalent to a process capability of Cpk = 1.5
C.six-sigma corresponds to a + 3 standard deviations on either sides of the mean
D.Motorola invented the term "six-sigma quality" in the mid-80s.
E.All the above statements are true


2. The appearance of the TV cabinet is not satisfactory. This is an example of:
A.variable measurement
B.mean chart
C.range chart
D.attribute measurement
E.none of the above


3. Which of the following quality control sample statistics indicates a quality characteristic that is an attribute?
A.mean
B.proportion
C.variance
D.standard deviation
E.range


4. For which of the following would a p-chart be used?
A.monitor dispersion in sample data
B.monitor the number of defects per unit
C.measure the central tendency
D.measure the variability
E.monitor the fraction defective


5.

Construct an appropriate control chart that will describe 95.5 of the chance variation in the process when the process is in control. Each sample contains 100 items.

Sample

Number of Defectives


1

10


2

12


3

14


4

11


5

13


R-1 ch07t01

What control chart is most suitable for this problem?
A.mean
B.proportion
C.variance
D.standard deviation
E.range



6.

Construct an appropriate control chart that will describe 95.5 of the chance variation in the process when the process is in control. Each sample contains 100 items.

Sample

Number of Defectives


1

10


2

12


3

14


4

11


5

13


R-1 ch07t01

The 95.5% control limits for this chart is:
A.0.95 and 0.05
B.0.06 and 0.18
C.0.18 and 0.02
D.0.16 and 0.04
E.none of the above



7.

Construct an appropriate control chart that will describe 95.5 of the chance variation in the process when the process is in control. Each sample contains 100 items.

Sample

Number of Defectives


1

10


2

12


3

14


4

11


5

13


R-1 ch07t01

Is the process in-control?
A.Yes
B.No
C.Not sure



8. Which of the following are issues of concerns when using control charts?
A.Sample size
B.Frequency of samples
C.Number of samples
D.Control limits
E.A, B, and C
F.All of the above


9. Which of the following statements is not true about acceptance sampling?
A.May involve inspectors taking random samples of finished products and measuring them against predetermined standards
B.May involve inspectors taking random samples of incoming raw materials and measuring them against predetermined standards
C.Is less economical than 100% inspection
D.May be either a variable or attribute type


10. The primary objective of an acceptance sampling plan is:
A.To eliminate the bad part from the sample
B.To determine if there is a need to test every part in the lot
C.To estimate whether or not the quality of the parts in the sample are acceptable
D.To estimate whether or not the entire lot is of acceptable quality



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