A test for Crohn's disease classifies 81% of people with the disease as affected and 6% of those who don't have the disease as affected. It is known that about 0.06% of the population has Crohn's disease. a) What are the false positive and false negative rates? Page 3 of 5 b) c) What is the probability that someone tests positive for Crohn's disease? What is the probability that someone classified as affected does in fact have the disease? i) Solve this problem by drawing up a contingency table ii) Solve using conditional probability and the law of total probability.

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 4ECP: Show that the probability of drawing a club at random from a standard deck of 52 playing cards is...
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A test for Crohn's disease classifies 81% of people with the disease as affected and
6% of those who don't have the disease as affected. It is known that about 0.06% of
the population has Crohn's disease.
a)
What are the false positive and false negative rates?
Page 3 of 5
b)
c)
What is the probability that someone tests positive for Crohn's disease?
What is the probability that someone classified as affected does in fact
have the disease?
i)
Solve this problem by drawing up a contingency table
ii)
Solve using conditional probability and the law of total probability.
Transcribed Image Text:A test for Crohn's disease classifies 81% of people with the disease as affected and 6% of those who don't have the disease as affected. It is known that about 0.06% of the population has Crohn's disease. a) What are the false positive and false negative rates? Page 3 of 5 b) c) What is the probability that someone tests positive for Crohn's disease? What is the probability that someone classified as affected does in fact have the disease? i) Solve this problem by drawing up a contingency table ii) Solve using conditional probability and the law of total probability.
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