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Chapter 4: Q20 (page 143)
In Exercises 13鈥�20, express the indicated degree of likelihood as a probability value between 0 and 1.
Death and Taxes Benjamin Franklin said that death is a certainty of life.
The probability that death will occur is 1.
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In Exercises 21鈥�24, refer to the sample data in Table 4-1, which is included with the Chapter Problem. Assume that 1 of the 555 subjects included in Table 4-1 is randomly selected.
Positive Test Result (Test shows drug use) | Negative Test Result (Test shows no drug use) | |
Subject Uses Drugs | 45 (True Positive) | 5 (False Negative) |
Subject Does Not Use drugs | 25 (False Positive) | 480 (True Negative) |
Drug Testing Job Applicants Find the probability of selecting someone who got a result that is a false negative. Who would suffer from a false negative result? Why?
In Exercises 9鈥�20, use the data in the following table, which lists drive-thru order accuracy at popular fast food chains (data from a QSR Drive-Thru Study). Assume that orders are randomly selected from those included in the table.
惭肠顿辞苍补濒诲鈥檚 | Burger King | 奥别苍诲测鈥檚 | Taco Bell | |
Order Accurate | 329 | 264 | 249 | 145 |
OrderNotAccurate | 33 | 54 | 31 | 13 |
Fast Food Drive-Thru Accuracy If three different orders are selected, find the probability that they are all from 奥别苍诲测鈥檚
In Exercises 13鈥�20, express the indicated degree of likelihood as a probability value between 0 and 1.
Luggage Based on a Harris poll, if you randomly select a traveller, there is a 43% chance that his or her luggage is black.
At Least One. In Exercises 5鈥�12, find the probability.
Births in China In China, where many couples were allowed to have only one child, the probability of a baby being a boy was 0.545. Among six randomly selected births in China, what is the probability that at least one of them is a girl? Could this system continue to work indefinitely? (Phasing out of this policy was begun in 2015.)
Probability Rewrite the following statement so that the likelihood of rain is expressed as a value between 0 and 1: 鈥淭he probability of rain today is 25%.鈥�
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