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标题: Reading 8: Probability Concepts-LOS d习题精选 [打印本页]

作者: bmaggie 时间: 2010-4-12 13:55 标题: [2010]Session 2:-Reading 8: Probability Concepts-LOS d习题精选

Session 2: Quantitative Methods: Basic Concepts
Reading 8: Probability Concepts

LOS d: Distinguish between unconditional and conditional probabilities.

Let A and B be two mutually exclusive events with P(A) = 0.40 and P(B) = 0.20. Therefore:

A)
P(B|A) = 0.20.

B)
P(A and B) = 0.

C)
P(A and B) = 0.08.

作者: bmaggie 时间: 2010-4-12 13:55

Let A and B be two mutually exclusive events with P(A) = 0.40 and P(B) = 0.20. Therefore:

A)
P(B|A) = 0.20.

B)
P(A and B) = 0.

C)
P(A and B) = 0.08.

If the two evens are mutually exclusive, the probability of both ocurring is zero.

作者: bmaggie 时间: 2010-4-12 13:56

For a given corporation, which of the following is an example of a conditional probability? The probability the corporation's:

A)
dividend increases given its earnings increase.

B)
earnings increase and dividend increases.

C)
inventory improves.

作者: bmaggie 时间: 2010-4-12 13:56

For a given corporation, which of the following is an example of a conditional probability? The probability the corporation's:

A)
dividend increases given its earnings increase.

B)
earnings increase and dividend increases.

C)
inventory improves.

A conditional probability involves two events. One of the events is a given, and the probability of the other event depends upon that given.

作者: bmaggie 时间: 2010-4-12 13:56

For an unconditional probability:

A)

there are at least two events.

B)

the addition rule is important.

C)

there is only one random variable of concern.

作者: bmaggie 时间: 2010-4-12 13:57

For an unconditional probability:

A)

there are at least two events.

B)

the addition rule is important.

C)

there is only one random variable of concern.

An unconditional probability gives the probability of an event regardless of what other events occur

作者: zaestau 时间: 2010-4-26 23:29

c

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