A 50-year old woman without symptoms participates in mammography screening and tests positive. She is frightened by
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A 50-year old woman without symptoms participates in mammography screening and tests positive. She is frightened by the prospect of having breast cancer. The sensitivity of mammography is 90 percent, the falsealarm rate is 9 percent, and the prevalence of undetected breast cancer in this population is 1 percent. What is the chance that the woman actually has breast cancer? (Hint: translate the percentages into natural frequencies)
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