Chapter 5: Q 34. (page 298)
Use the correct choice from the previous question and these random digits to simulate 10 shots:How many of these 10 shots are hits? (a) (b) (c) (d) (e)
Short Answer
There are hits out of a possible
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Chapter 5: Q 34. (page 298)
Use the correct choice from the previous question and these random digits to simulate 10 shots:How many of these 10 shots are hits? (a) (b) (c) (d) (e)
There are hits out of a possible
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Probability models? In each of the following situations, state whether or not the given assignment of probabilities to individual outcomes is legitimate, that is, satisfies the rules of probability. If not, give specific reasons for your answer.
(a) Roll a die and record the count of spots on the up-face: P(1) = 0, P(2) = 1/6, P(3) = 1/3, P(4) = 1/3,
P(5) = 1/6, P(6) = 0.
(b) Choose a college student at random and record gender and enrollment status: P(female full-time) = 0.56, P(male full-time) = 0.44, P(female part-time) = 0.24, P(male part-time) = 0.17.
(c) Deal a card from a shuffled deck: P(clubs) = 12/52, P(diamonds) = 12/52, P(hearts) = 12/52,
P(spades) = 16/52.
Fill 鈥檈rr up! In a recent month, of automobile drivers filled their vehicles with regular gasoline, purchased midgrade gas, and bought premium gas. Of those who bought regular gas, paid with a credit card; of customers who bought midgrade and premium gas, and , respectively, paid with a credit card. Suppose we select a customer at random.
Draw a tree diagram to represent this situation. What鈥檚 the probability that the customer paid with a credit card? Use the four-step process to guide your work.
Cold weather coming to A TV weather man, predicting a colder-than-normal winter, said, 鈥淔irst, in looking at the past few winters, there has been a lack of
really cold weather. Even though we are not supposed to use the law of averages, we are due.鈥 Do you think that 鈥渄ue by the law of averages鈥 makes sense in talking about the weather? Why or why not?
Make a two-way table that displays the sample space.
Preparing for the GMAT A company that offers courses to prepare students for the Graduate Management Admission Test (GMAT) has the following information about its customers: are currently undergraduate students in business; are undergraduate students in other fields of study; are
college graduates who are currently employed, and are college graduates who are not employed. Choose a customer at random.
(a) What鈥檚 the probability that the customer is currently an undergraduate? Which rule of probability did you use to find the answer?
(b) What鈥檚 the probability that the customer is not an undergraduate business student? Which rule of probability did you use to find the answer?
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