Answer the following: a) A table, formula, or graph that shows all possible values a random variable can assume, together with their associated probabilities, is called a(n): probability distribution. discrete random variable. expected value of a discrete random variable. None of these choices. b) The number of customers making a purchase out of 30 randomly selected customers has a Poisson distribution. True False c) On average, 1.6 customers per minute arrive at any one of the checkout counters of Sunshine food market. What type of probability distribution can be used to find out the probability that there will be no customers arriving at a checkout counter in 10 minutes? Poisson distribution Normal distribution Binomial distribution None of these choices.
QUESTION 16
Answer the following:
a) A table, formula, or graph that shows all possible values a random variable can assume, together with their associated probabilities, is called a(n):
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probability distribution. |
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discrete random variable. |
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expected value of a discrete random variable. |
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None of these choices. |
b) The number of customers making a purchase out of 30 randomly selected customers has a Poisson distribution.
True
False
c) On average, 1.6 customers per minute arrive at any one of the checkout counters of Sunshine food market. What type of probability distribution can be used to find out the probability that there will be no customers arriving at a checkout counter in 10 minutes?
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Poisson distribution |
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Normal distribution |
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Binomial distribution |
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None of these choices. |
d) Elizabeth's Portfolio Elizabeth has decided to form a portfolio by putting 30% of her money into stock 1 and 70% into stock 2. She assumes that the expected returns will be 10% and 18%, respectively, and that the standard deviations will be 15% and 24%, respectively.
Compute the standard deviation of the returns on the portfolio assuming that the two stocks' returns are perfectly
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21.3% |
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19.3% |
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29% |
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33% |
e) In a Poisson distribution, the:
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mean equals the standard deviation. |
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median equals the standard deviation. |
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mean equals the variance. |
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None of these choices. |
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