Transcript Homework Problem 2-18

Kevin McShane Homework Problem 2-36 Trowbridge Mfg Co.
11/07/06
Refer to 2-35 Trowbridge quality control inspection procedure is to
select 6 items, and if there are 0 or 1 defective cases in the group of
6, the process is said to be in control. If the number of defects is
more than 1, the process is out of control. Suppose that the true
proportion of defective items is 0.15. What is the probability that
there will be 0 or 1 defects in a sample of 6 if the true proportion of
defects is .015?
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Kevin McShane Homework Problem 2-36 Trowbridge Mfg Co.
11/07/06
To answer the question I went to the Binomial Probabilities
Appendix B on page 706.
n=6
P=(x is less than or equal to 1)
P=0.15
r=(x=1) + r(x=0)
.3771 + .3993 = .7764
Answer is .776
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