Population Samples Narrative
A sample is selected from one of two populations, and
, with probabilities P(
) = 0.80 and P(
) = 0.20. If the sample has been selected from
, the probability of observing an event A is P(A/
) = 0.15. Similarly, If the sample has been selected from
, the probability of observing A is P(A/
) = 0.25.
-Refer to Population Samples Narrative. If a sample is randomly selected and event A is observed, what is the probability that the sample was selected from population ? From population
?
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