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Posterior probability

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Ace Machine Works estimates that the probability its lathe tool is properly adjusted is 0.8. When the lathe is properly adjusted, there is a 0.9 probability that the parts produced pass inspection. If the lathe is out of adjustment, however, the probability of a good part being produced is only 0.2. A part randomly chosen is inspected and found to be acceptable. At this point what is the posterior probability that the lathe tool is properly adjusted?

Solution Summary

Calculates the posterior probability that the lathe tool is properly adjusted.

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probability that the lathe is properly adjusted= 0.8
Therefore the probability that the lathe is not properly adjusted=1-0.8= 0.2

the probabilty that the parts are acceptable when the lathe is properly adjusted = 0.9
the probabilty that the parts are acceptable when the lathe is not ...

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