14. Find the new c chart when n is doubled for an existing c chart with the process average being equal to 25 nonconformities.

Select one:

a. UCL=41.21 LCL=-1.21

b. UCL=40 LCL=10

c. UCL=41.21 LCL=0

d. UCL=65 LCL=35

e. UCL=23.11 LCL=1.89

15. Which of the following is NOT one of the rules mentioned in the book for choosing the sample size n for np and p charts?

Select one:

a. The probability of finding at least 1 nonconforming unit per sample is at most g

b. None of those listed

c. Sample size should be large enough so that we have approximately a 50% chance for detecting a process shift of some specified amount

d. Sample size should be large enough so that the control chart will have a positive LCL

16. For a 3-sigma xbar chart with sample size of 4, the probability of detecting 1.5 sigma process mean shift is most likely

Select one:

a. 0.5

b. 0.93

c. 0.07

d. 0.28

e. 0.72

17. Considering a c chart with LCL=0.513 & UCL=19.487, what is the probability of detecting the mean number of nonconformities shifted to 20?

Select one:

a. 0.470

b. 0.997

c. 0.125

d. 0.875

e. 0.530