91. Consider that for a process s bar (average standard deviation of 50 samples each of size 4) is found to be 10.04. The value of c4 (corresponding to sample size of .4) is .92. What is the estimated value of process standard deviation?
10.91 (s bar/ c4 is an unbiased estimator of standard deviation)
11.89
12.67
9.67
Correct answer: (A) 10.91 (s bar/ c4 is an unbiased estimator of standard deviation)
92. The basic assumption of calculating the control limits based on average sample size (for a p chart) will ______________ from/as those previously observed.
Greatly differ
Will be exactly the same
Not greatly differ
None of the above
Correct answer: (C) Not greatly differ
93. The g chart is the control chart for:
Average number of events
Total number of events
Mean number of events
None of the above
Correct answer: (B) Total number of events
94. Attribute charts may be used when:
Several characteristics can be jointly measured
When one particular quality characteristic is of importance
Specific information like process mean is required
None of the above
Correct answer: (A) Several characteristics can be jointly measured
95. The thickness of the blade of a fan is specified to lie between 4 cm and 6 cm. The length of the blades must lie between 10 cm and 20 cm. A fan blade randomly selected from a sample of 100 blades has a thickness of 5cm and a length of 21cm. The number of defect(s) the blade has is ______________.
One
Two
There is no defect
Three
Correct answer: (A) One
96. The probability of getting a multiple of 2 on throwing a dice once is:
1/6
¼
½
1/3
Correct answer: (A) 1/6
97. Inspection of incoming/outgoing items is an example of ______________.
Prevention Cost
Appraisal Cost
Internal Failure Cost
External Failure Cost
Correct answer: (B) Appraisal Cost
98. Four basic characteristics of an optimal process are: