Probability Explanation And Exercises Worksheet Page 34
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3716. True/False: Suppose that at your regular physical exam you test positive for a
relatively rare disease. You will need to start taking medicine if you have the
disease, so you ask your doc- tor about the accuracy of the test. It turns out that
the test is 98% accurate. The probability that you have Disease X is therefore
0.98 and the probability that you do not have it is .02. Explain your answer.
Questions from Case Studies
Diet and Health (DH) case study
17. (DH)
a. What percentage of people on the AHA diet had some sort of illness or
death?
b. What is the probability that if you randomly selected a person on the AHA
diet, he or she would have some sort of illness or death?
c. If 3 people on the AHA diet are chosen at random, what is the probability
that they will all be healthy?
18. (DH)
a. What percentage of people on the Mediterranean diet had some sort of
illness or death?
b. What is the probability that if you randomly selected a person on the
Mediterranean diet, he or she would have some sort of illness or death?
c. What is the probability that if you randomly selected a person on the
Mediterranean diet, he or she would have cancer?
d. If you randomly select five people from the Mediterranean diet, what is the
probability that they would all be healthy?
The following questions are from ARTIST (reproduced with permission)
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