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Its never lupus. Lupus is a medical phenomenon where

Chapter , Problem 2.25

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QUESTION:

It's never lupus. Lupus is a medical phenomenon where antibodies that are supposed to attack foreign cells to prevent infections instead see plasma proteins as foreign bodies, leading to a high risk of blood clotting. It is believed that 2% of the population suffer from this disease. The test is 98% accurate if a person actually has the disease. The test is 74% accurate if a person does not have the disease. There is a line from the Fox television show House that is often used after a patient tests positive for lupus: It's never lupus. Do you think there is truth to this statement? Use appropriate probabilities to support your answer.

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QUESTION:

It's never lupus. Lupus is a medical phenomenon where antibodies that are supposed to attack foreign cells to prevent infections instead see plasma proteins as foreign bodies, leading to a high risk of blood clotting. It is believed that 2% of the population suffer from this disease. The test is 98% accurate if a person actually has the disease. The test is 74% accurate if a person does not have the disease. There is a line from the Fox television show House that is often used after a patient tests positive for lupus: It's never lupus. Do you think there is truth to this statement? Use appropriate probabilities to support your answer.

ANSWER:

Step 1 of 3

Given,

The population suffering from this disease = 2%

Accuracy rate of test for an individual who has disease = 98%

Accuracy rate of test for an individual who does not have disease = 74%

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