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# 1) IF P(A) = P(A|B), THEN EVENTS A AND B ARE SAID TO BE

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Author: Christine Farr
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1) If P(A) = P(A|B), then events A and B are said to be

A.mutually exclusive

B.complementary

C.exhaustive

D.independent

Question
According to an Internet posting, 80% of adults enjoy drinking beer. A group of 7 adults is chosen randomly. The probability that no more than 3 of them enjoy drinking beer is:

A.0.029

B.0.267

C.0.429

D.0.033

Part 4 of 9 -

Question
1.0 Points

If Z is a standard normal random variable, then the value z for which P(-z < Z < z) equals 0.8764 is

A.0.3764

B.3.08

C.1.16

D.1.54

Question
1.0 Points

Given that Z is a standard normal variable, the value z for which P(Z < z) = 0.2580 is

A.0.758

B.0.242

C.-0.70

D.-0.65

Question
1.0 Points

Find the probability, P(Z < 0.17), using the standard normal distribution.

A..8300

B..4325

C..5675

D..0675

Question
1.0 Points

One reason for standardizing random variables is to measure variables with:

A.dissimilar means and similar standard deviations in like terms

B.similar means and standard deviations on two scales

C.different means and standard deviations on a non-standard scale

D.different means and standard deviations on a single scale

Question
1.0 Points

The continuous distribution characterized by a symmetric, bell-shaped curve is the:

A.normal distribution

B.Poisson distribution

C.exponential distribution

D.binomial distribution

(more)
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