Question

use the following results from a test for marijuana use, which is provided by a certain drug - testing company. among 142 subjects with positive test results, there are 20 false - positive results. among 154 negative results, there are 2 false - negative results. complete parts (a) through (c). (hint: construct a table.) a. how many subjects were included in the study? the total number of subjects in the study was 296. b. how many subjects did not use marijuana? a total of subjects did not use marijuana.

Explanation:

Step1: Analyze the components of non - users

Non - users are composed of false positives and true negatives.

Step2: Identify the number of false positives and true negatives

False positives = 20, true negatives = 154 - 2=152.

Step3: Calculate the number of non - users

Add the number of false positives and true negatives: 20 + 152 = 172.

Answer:

172