Use the following results from a test for marijuana use, which is provided by a

Question

Use the following results from a test for marijuana use, which is provided by a certain drug testing company. Among 141 subjects with positive test results, there are 30 false positive results. Among 155 negative results, there are 2 false negative results. Complete parts A through C.

A. How many subjects were included in the study?

The total number of subjects in the was?

B. How many subjects did not use marijuana?

A total of blank? did not use marijuana?

C. What is the probability that a randomly selected subject did not use marijuana ?

The probability that a randomly selected subject did not use marijuana is blank?

(Do not round until the final answer then round to three places as needed.
           

Score: 0 of 2 pls 34.2.21 Use the folowing resuts rom a es Hw Score:88%, 176of20pts for ajuana use, which is provided by a erntain d labse nagative esults Complete parts (a) thraugh ( H a Haw many subjects were inckided in the staty? The satal number of subjects in the study w Conshuct a uoke) Enter your an'swet in the answer box and then cick k Ans

Explanation / Answer

solution=

a. The total number of subjects in the study was 296.

(141 + 155)

b. A total of 183 subjects did not use marijuana

(30 + 155 – 2)

c. The probability that a randomly selected subject did not use marijuana is 0.6182.

(183 ÷ 296) = 0.6182432432

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