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Q21. Bayes’ theorem cannot finds the actual probability of an event from the results of your tests?

1.      True

2.      False

Ans: 2

Exp: Bayes’ theorem finds the actual probability of an event from the results of your tests. For example, you can:

• Correct for measurement errors. If you know the real probabilities and the chance of a false positive and false negative, you can correct for measurement errors.
• Relate the actual probability to the measured test probability. Bayes’ theorem lets you relate Pr(A|X), the chance that an event A happened given the indicator X, and Pr(X|A), the chance the indicator X happened given that event A occurred. Given mammogram test results and known error rates, you can predict the actual chance of having cancer.

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