Concept explainers
(a)
To Explain: the testing athletes for performance-enhancing drugs.
(a)
Answer to Problem 7.68E
False Negative
Explanation of Solution
False positive
It happens when the test is positive, while the subjects do not have drugs or have the disease
False negative
It happens when the test is negative, while the subjects took drugs or did not have the disease.
Situation: testing athletes for drugs
False positive: athlete test positive for drugs, while the athletes do not take drugs.
False negative: athlete tests negative for drugs, while athlete takes drugs.
Athletes test negative for a drug is the most serious error, he/she taken while taking the drugs, because then the drugs is not detected. Therefore a false negative is worse.
If someone tests positive for drugs, they can regain this athlete and if the athlete tests positive again, then it is very unlikely that is was a false positive.
(b)
To Explain: the testing people for a life-threatening disease.
(b)
Answer to Problem 7.68E
False Negative
Explanation of Solution
Situation: testing athletes for drugs
False positive: athlete test positive for disease, while the person does not have the disease.
False negative: athlete tests negative for disease, while person have disease.
Person test negative for a diseases is the most serious error, he/she taken while having the disease because then the disease is not detected. Therefore a false negative is worse.
If someone tests positive for disease, they can regain this people and if the person tests positive again, then it is very unlikely that is was a false positive
Chapter 7 Solutions
Statistics Through Applications
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