2. A polygraph is a lie detector tests. Assume that the test correctly identifies a lie 88% of the time and it correctly identifies the truth and 86% of the time. Since most people have no reason to lie, assume that the probability that a randomly selected person lies is 0.01. a) What is the probability that the test says that a randomly selected person is lying? b) If the test says that the person is lying, what is the probability that the person is saying the truth?

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...
icon
Related questions
Question
2. A polygraph is a lie detector tests. Assume that the test correctly identifies a lie 88% of
the time and it correctly identifies the truth and 86% of the time. Since most people have
no reason to lie, assume that the probability that a randomly selected person lies is 0.01.
a) What is the probability that the test says that a randomly selected person is lying?
b) If the test says that the person is lying, what is the probability that the person is saying
the truth?
Transcribed Image Text:2. A polygraph is a lie detector tests. Assume that the test correctly identifies a lie 88% of the time and it correctly identifies the truth and 86% of the time. Since most people have no reason to lie, assume that the probability that a randomly selected person lies is 0.01. a) What is the probability that the test says that a randomly selected person is lying? b) If the test says that the person is lying, what is the probability that the person is saying the truth?
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps with 1 images

Blurred answer
Recommended textbooks for you
A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
Probability
ISBN:
9780134753119
Author:
Sheldon Ross
Publisher:
PEARSON
A First Course in Probability
A First Course in Probability
Probability
ISBN:
9780321794772
Author:
Sheldon Ross
Publisher:
PEARSON