3. The table below includes results from 1000 adults. If one of the 1000 subjects is randomly selected, find the following: Positive Test Subject Uses Drugs Subject is not a Drug User a. P(positive test/uses drugs) b. P(positive test and uses drugs) c. P(positive test or uses drugs) d. Are the events positive test and uses drugs disjoint? Why or why not? positive test negative test 44 6 90 860
Added by Kenneth M.
Close
Step 1
- Total number of subjects who use drugs: 44 - Total number of subjects who tested positive: 44 (positive test/uses drugs) + 90 (positive test/not a drug user) = 134 Show more…
Show all steps
Your feedback will help us improve your experience
Rashmi Sinha and 51 other Intro Stats / AP Statistics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Refer to the table which summarizes the results of testing for a certain disease. . Positive Test Result Negative Test Result Subject has the disease 87 9 Subject does not have the disease 27 312 A test subject is randomly selected and tested for the disease. What is the probability that: a) The subject selected has the disease b) The subject selected has a negative test result c) The subject selected has the disease given that the test result is negative d) The subject selected has a positive test result given that the subject does not have the disease e) The subject selected has the disease and has a negative test result f) The subject selected has a positive test result or does not have the disease
Rashmi S.
Shyam P.
2. One thousand people are screened for a certain disease and classified as in the following table. Disease Status Age | None | Mild | Moderate | Severe | Totals 18-40 | 213 | 51 | 33 | 23 | 320 Over 40 | 430 | 121 | 98 | 31 | 680 Totals | 643 | 172 | 131 | 54 | 1,000 If one individual is selected at random from this population, what is the probability of selecting someone who is in the 18 - 40 age group or has a severe form of the disease? a. 0.286 b. 0.374 c. 0.351 d. 0.023 3. Which of the following numbers can represent a probability? a. 3/2 b. -0.02 c. 0.15 d. 6.13 4. Among households in the United States, 51 million have 3 or more vehicles. Assuming there are 106 million households in the United States, what is the probability that a household selected at random does not have 3 or more vehicles? a. 3 b. 0.3 c. 51/106 d. 55/106 5. Let X denote the number of times a missile hits a selected target in n = 5 trials. The probability distribution of X is the following: x | 0 | 1 | 2 | 3 | 4 | 5 p(x) | 0.0014 | 0.0194 | 0.1049 | 0.2836 | 0.3834 | 0.2073 Use the above table to determine the probability that at least 4 hits occur in n = 5 trials. a. 0.4093 b. 0.3834 c. 0.2073 d. 0.5907
Tim T.
Recommended Textbooks
Elementary Statistics a Step by Step Approach
The Practice of Statistics for AP
Introductory Statistics
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD