Estimates of the prevalence of Alzheimer's disease have recently been provided by Pfeffer et al. The estimates are given in Table 3.5. Table 3.5 Prevalence of Alzheimer's Disease (Cases per 100 Population) Age group 65-69 70-74 75-79 80-84 85+ Males Females 1.6 0.0 0.0 2.2 4.9 2.3 8.6 7.8 35.0 27.9 Suppose an unrelated 77-year-old man, 76-year-old woman, and 82-year-old woman are selected from a community.

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What is the probability that at least one of the three people has Alzheimer’s disease?

 

Suppose we know one of the three people has Alzheimer’s disease, but we don’t know which one. What is the conditional probability that the affected person is a woman?

Estimates of the prevalence of Alzheimer's disease have recently been provided by Pfeffer et al.
The estimates are given in Table 3.5.
Table 3.5 Prevalence of Alzheimer's Disease (Cases per 100 Population)
Age group
65-69
70-74
75-79
80-84
85+
Males
Females
1.6
0.0
0.0
2.2
4.9
2.3
8.6
7.8
35.0
27.9
Suppose an unrelated
77-year-old man, 76-year-old woman, and 82-year-old woman
are selected from a community.
Transcribed Image Text:Estimates of the prevalence of Alzheimer's disease have recently been provided by Pfeffer et al. The estimates are given in Table 3.5. Table 3.5 Prevalence of Alzheimer's Disease (Cases per 100 Population) Age group 65-69 70-74 75-79 80-84 85+ Males Females 1.6 0.0 0.0 2.2 4.9 2.3 8.6 7.8 35.0 27.9 Suppose an unrelated 77-year-old man, 76-year-old woman, and 82-year-old woman are selected from a community.
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