Intro Stats, Books a la Carte Edition (5th Edition)
5th Edition
ISBN: 9780134210285
Author: Richard D. De Veaux, Paul Velleman, David E. Bock
Publisher: PEARSON
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Chapter 12, Problem 82E
No-shows An airline offers discounted “advance-purchase” fares to customers who buy tickets more than 30 days before travel and charges “regular” fares for tickets purchased during those last 30 days. The company has noticed that 60% of its customers take advantage of the advance-purchase fares. The “no-show” rate among people who paid regular fares is 30%, but only 5% of customers with advance-purchase tickets are no-shows.
- a) What percent of all ticket holders are no-shows?
- b) What’s the
probability that a customer who didn’t show had an advance-purchase ticket? - c) Is being a no-show independent of the type of ticket a passenger holds? Explain.
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Chapter 12 Solutions
Intro Stats, Books a la Carte Edition (5th Edition)
Ch. 12.1 - One common proposal for beating the lottery is to...Ch. 12.3 - We sampled some pages of this book at random to...Ch. 12.3 - Prob. 3JCCh. 12.5 - Prob. 4JCCh. 12.6 - Prob. 5JCCh. 12 - Flipping a coin Flipping a fair coin is said to...Ch. 12 - Dice Rolling a fair six-sided die is supposed to...Ch. 12 - Flipping a coin II Your friend says: I flipped...Ch. 12 - Dice II After rolling doubles on a pair of dice...Ch. 12 - Wardrobe In your dresser are five blue shirts,...
Ch. 12 - Prob. 6ECh. 12 - Cell phones and surveys A 2015 study conducted by...Ch. 12 - Cell phones and surveys II The survey by the...Ch. 12 - Pet ownership Suppose that 25% of people have a...Ch. 12 - Cooking and shopping Forty-five percent of...Ch. 12 - Sports What is the probability that a person likes...Ch. 12 - Sports again From Exercise 11, if someone doesnt...Ch. 12 - Late to the train A student figures that he has a...Ch. 12 - Field goals A nervous kicker usually makes 70% of...Ch. 12 - Titanic On the Titanic, the probability of...Ch. 12 - Prob. 16ECh. 12 - Facebook Facebook reports that 70% of its users...Ch. 12 - Prob. 18ECh. 12 - Prob. 19ECh. 12 - Prob. 20ECh. 12 - Prob. 21ECh. 12 - Online banking last time Given the probabilities...Ch. 12 - Sample spaces For each of the following, list the...Ch. 12 - Sample spaces II For each of the following, list...Ch. 12 - Prob. 25ECh. 12 - Rain The weather reporter on TV makes predictions...Ch. 12 - Winter Comment on the following quotation: What I...Ch. 12 - Snow After an unusually dry autumn, a radio...Ch. 12 - Auto insurance Insurance companies collect annual...Ch. 12 - Prob. 30ECh. 12 - Prob. 31ECh. 12 - Prob. 32ECh. 12 - Electronics Suppose that 46% of families living in...Ch. 12 - Homes Funding for many schools comes from taxes...Ch. 12 - Prob. 35ECh. 12 - Lefties Although its hard to be definitive in...Ch. 12 - Prob. 37ECh. 12 - Prob. 38ECh. 12 - Car repairs A consumer organization estimates that...Ch. 12 - Stats projects In a large Introductory statistics...Ch. 12 - More repairs Consider again the auto repair rates...Ch. 12 - Another project You are assigned to be part of a...Ch. 12 - Prob. 43ECh. 12 - Final project You used the Multiplication Rule to...Ch. 12 - Prob. 45ECh. 12 - Polling, part II According to Pew Research, the...Ch. 12 - Prob. 47ECh. 12 - Blood The American Red Cross says that about 45%...Ch. 12 - Prob. 49ECh. 12 - Disjoint or independent? In Exercise 48, you...Ch. 12 - Prob. 51ECh. 12 - The train To get to work, a commuter must cross...Ch. 12 - Prob. 53ECh. 12 - Pepsi For a sales promotion, the manufacturer...Ch. 12 - 9/11? On September 11, 2002, the first anniversary...Ch. 12 - Prob. 56ECh. 12 - Prob. 57ECh. 12 - Prob. 58ECh. 12 - Health The probabilities that an adult American...Ch. 12 - Immigration The table shows the political...Ch. 12 - Prob. 61ECh. 12 - Birth order, take 2 Look again at the data about...Ch. 12 - Batteries A junk box in your room contains a dozen...Ch. 12 - Prob. 64ECh. 12 - Eligibility A university requires its biology...Ch. 12 - Benefits Fifty-six percent of all American workers...Ch. 12 - Unsafe food Early in 2010, Consumer Reports...Ch. 12 - Prob. 68ECh. 12 - Prob. 69ECh. 12 - Politics Given the table of probabilities from...Ch. 12 - Gender A poll conducted by Gallup classified...Ch. 12 - Cars A random survey of autos parked in student...Ch. 12 - Prob. 73ECh. 12 - Prob. 74ECh. 12 - Late luggage Remember Leah (Exercise 73)? Suppose...Ch. 12 - Prob. 76ECh. 12 - Prob. 77ECh. 12 - Prob. 78ECh. 12 - Prob. 79ECh. 12 - Prob. 80ECh. 12 - Drunks Police often set up sobriety...Ch. 12 - No-shows An airline offers discounted...Ch. 12 - Prob. 83ECh. 12 - Parts A company manufacturing electronic...Ch. 12 - HIV testing In July 2005, the journal Annals of...Ch. 12 - Polygraphs Lie detectors are controversial...
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