Q1. If X and Y are independent events, which of the following is most accurate? A) P(X or Y) = (P(X)) × (P(Y)). B) P(X or Y) = P(X) + P(Y). C) P(X | Y) = P(X).
Q2. A company says that whether it increases its dividends depends on whether its earnings increase. From this we know: A) P(both dividend increase and earnings increase) = P(dividend increase). B) P(earnings increase | dividend increase) is not equal to P(earnings increase). C) P(dividend increase | earnings increase) is not equal to P(earnings increase).
Q3. If the outcome of event A is not affected by event B, then events A and B are said to be:
A) conditionally dependent. B) statistically independent. C) mutually exclusive.
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发表于 2009-1-9 09:29
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