PART 1. PART 2. PLEASE ANSWER ALL QUESTIONS ABOVE Use the following results from

Question

PART 1.

PART 2.

PLEASE ANSWER ALL QUESTIONS ABOVE

Use the following results from a test for marjuana use, which is provided by a certain drug testing company. Among 141 subjects with positive test resuts, there are 23 false positive results; among 155 negative results, there are 4 false negative results. If one of the test subjects is randomly selected, find the probability that the subject tested negative or did not use marjuana. (Hint Construct a table.) The probability that a randomly selected subject tested negative or did not use marjuana is Do not round until the final answer. Then round to three decimal places as needed.)

Explanation / Answer

PART 1)

The selected subject is negative or did not use marijuana: 159/323= 0.49226

PART 2)

A) Total 11: 1 red, 6 blue and 4 green

P(G) = 4/ 11

B) P(R) = 1/10

a) Both are dependent because the occurrence of one affects the probability of the other and 5% guideline can be applied in this case.

P(B) has occurred after occurrence of P(A).

b)P(A and B)= P(A)*P(B) = 4/11 * 1/ 10= 4/110 = 0.036364

TRUE FALSE Total Positive 141 23 164 Negative 155 4 159 Total 296 27 323

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