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Chapter 5: Q 94. (page 331)
Late flights An airline reports that 85% of its flights arrive on time. To find the probability that its next four flights into LaGuardia Airport all arrive on time, can
we multiply (0.85)(0.85)(0.85)(0.85)? Why or why not?
No.
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Preparing for the GMAT A company that offers courses to prepare students for the Graduate Management The 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’s the probability that the customer is currently an undergraduate? Which rule of probability did you use to find the answer?
(b) What’s the probability that the customer is not an undergraduate business student? Which rule of probability did you use to find the answer?
Color-blind men Refer to Exercise . Suppose we randomly select U.S. adult males. What’s the probability that at least one of them is red-green
color-blind? Design and carry out a simulation to answer this question. Follow the four-step process.
You want to estimate the probability that the player makes or more of shots. You simulate 10 shots 25 times and get the following numbers of hits:
What is your estimate of the probability?
(a) , or (d) , or
(b) , or (e) , or
(c) , or
Color-blind men Aboutof men in the United States have some form of red-green color blindness. Suppose we randomly select one U.S. adult male at a time until we find one who is red-green color-blind. How many men would we expect to choose, on average? Design and carry out a simulation to answer this question. Follow the four-step process.
Who eats breakfast? Students in an urban school were curious about how many children regularly eat breakfast. They conducted a survey, asking, “Do you eat breakfast on a regular basis?” All students in the school responded to the survey. The resulting data are shown in the two-way table
below. Male Female Total Eats breakfast regularly Doesn’t eat breakfast regularly
(a) Who are the individuals? What variables are being measured?
(b) If we select a student from the school at random, what is the probability that we choose
regularly?
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