Math 221
Quiz Review for Weeks 3 and 4
1.
State whether the variable is discrete or continuous.
The # of keys on each student's key chain.
2.
Decide whether the experiment is a binomial experiment. Explain why by citing
the properties of binomial experiments.
Testing a pain reliever using 20 people to determine if it is effective. The random
variable represents the number of people who find the pain reliever to be
effective.
3.
Use the binomial probability distribution to answer the following probability
questions. According to government data, the probability that an adult under 35
was never married is 25%. In a random survey of 10 adults under 35, what is the
probability that:
Exactly 5 were never married?
4.
Use the binomial probability distribution to answer the following probability
questions. According to government data, the probability that an adult under 35
was never married is 25%. In a random survey of 10 adults under 35, what is the
probability that:
No more than two were never married?
5.
True or False: Given the basic rules of Probability, P(A) can be equal to negative
0.18 or  18%.
6.
We have the random variable X = {3, 6} with P(3) = .15 and P(6) = .85. Find
E(X).
7.
Use the binomial probability distribution to answer the following probability
questions. According to government data, the probability that an adult under 35
was never married is 25%. In a random survey of 10 adults under 35, what is the
probability that:
Between 4 and 6 were never married (inclusive)?
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 Spring '09
 FORGOT
 Statistics, Binomial, Normal Distribution, Probability, Probability theory, Discrete probability distribution, following probability questions

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