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uana drug test study showed 143 subjects with positive test results including 24 false positive results. There were 157 negative results, includ

College Algebra

10th Edition

ISBN:9781337282291

Author:Ron Larson

Publisher:Ron Larson

Chapter8: Sequences, Series,and Probability

Section8.7: Probability

Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....

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Concept explainers

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

Question

Results from a marijuana drug test study showed 143 subjects with positive test results including 24 false positive results. There were 157 negative results, including 3 false negative results. What is the probability that a randomly selected subject did not use marijuana? Round to three decimal places as needed.

Expert Solution

Step 1

Make a table of the given data:

	Use marijuana	Not use marijuana
Positive		24	143
Negative	3		157
Total			300

Now, fill the table as follows:

	Use marijuana	Not use marijuana
Positive	143-24=119	24	143
Negative	3	157-3=154	157
Total	122	178	300

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uana drug test study showed 143 subjects with positive test results including 24 false positive results. There were 157 negative​ results, includ

uana drug test study showed 143 subjects with positive test results including 24 false positive results. There were 157 negative results, includ