Answered: find P (condition absent | getting test…

Math

Probability

find P (condition absent | getting test result –)

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Question

Diagnostic tests of medical conditions have several results. The test result can be positive or
negative. A positive test (+) indicates the patient has the condition. A negative test (–)
indicates the patient does not have the condition. Remember, a positive test does not prove
the patient has the condition. Additional medical work may be required. Consider a random
sample of 132 patients, some of whom have a medical condition and some of whom do not.
Results of a new diagnostic test for the condition are shown.2
Condition Present Condition Absent Row Total
Test Result + 112 20 132
Test Result – 20 57 77
Column Total 132 77 209

Assume that the sample is representative of the entire population. For a person selected at random, find P (condition absent | getting test result –). Round your answer to the nearest hundredth.

Group of answer choices

0.26

0.27

0.85

d. 0.74

none of these choices

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