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A quality-control engineer samples 100 items manufactured
Chapter 2, Problem 11E(choose chapter or problem)
A quality-control engineer samples 100 items manufactured by a certain process, and finds that 15 of them are defective. True or false:
a. The probability that an item produced by this process is defective is 0.15.
b. The probability that an item produced by this process is defective is likely to be close to 0.15, but not exactly equal to 0.15.
Questions & Answers
QUESTION:
A quality-control engineer samples 100 items manufactured by a certain process, and finds that 15 of them are defective. True or false:
a. The probability that an item produced by this process is defective is 0.15.
b. The probability that an item produced by this process is defective is likely to be close to 0.15, but not exactly equal to 0.15.
ANSWER:
Answer:
Step 1 of 3:
A quality control engineer samples 100 items manufactured by a certain process, and finish that 15 of them are defective.
The proportion of defectives are
Where, x is 15 defectives selected from 100 samples.
n is number of samples.
Therefore,
= 0.15