3. The reliability of a test for a skin disease SD is as follows: If the subject has SD, the test ispositive 98% of the time. If the subject does not have SD, the test is negative 99% of the time.From a large population in which 0.3% of people have SD, a person is selected at random andgiven the test, which comes back positive. What is the probability that the person actuallyhas SD?

we have to find the probability of person who actually has sd.

. The reliability of a test for a skin disease SD is as follows: If the subject h positive 98% of the time. If the subject does not have SD, the test is negative From a large population in which 0.3% of people have SD, a person is selecte given the test, which comes back positive. What is the probability that th

. The reliability of a test for a skin disease SD is as follows: If the subject h positive 98% of the time. If the subject does not have SD, the test is negative From a large population in which 0.3% of people have SD, a person is selecte given the test, which comes back positive. What is the probability that th

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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i need help answering questions 1 and 2 that go along with picture... 1. P(four or more cell phones)= (Round to three decimal places as needed.) 2. Is it unlikely for a household to have four or more cell phones in use? A. Yes, because the probability of a respondent with four or more cell phones in use is greater than0.05. B.No, because the probability of a respondent with four or more cell phones in use is greater than 0.05. C.No,because the probability of a respondent with four or more cell phones in use is less than or equal to 0.05. D.Yes,because the probability of a respondent with four or more cell phones in use is less than or equal to0.05.
According to a poll of adults, about 43% work during their summer vacation. Assume that the true proportion of all adults that work during summer vacation is p=0.43. Now consider a random sample of 400 adults. Complete parts a and b below. IN a. What is the probability that between 36% and 50% of the sampled adults work during summer vacation? The probability is. (Round to three decimal places as needed.) b. What is the probability that over 55% of the sampled adults work during summer vacation? The probability is (Round to three decimal places as needed.) 4
I personally have used statistics in trying to challenge the reliability of drug testing results. Suppose the chance of a mistake in the taking and processing of a urine sample for a drug test is just 1 in 100. And your client has a "dirty" (i.e., positive) test result. Only a 1 in 100 chance that it could be wrong? Not necessarily. If the vast majority of all tests given-say 99 in 100-are truly clean, then you get one false dirty and one true dirty in every 100 tests, so that half of the dirty tests are false. Define the following events as: TD = TC = D = event that the person tested is actually dirty C = event that the person tested is actually clean (a) Using the information in the quote, find the values of each of the following. event that the test result is dirty event that the test result is clean (i) P(TD|D) (ii) P(TDIC) (iii) P(C) (iv) P(D) X X (b) Use the law of total probability to find P(TD). (c) Use Bayes' rule to evaluate P(C|TD). X
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Refer to the sample data for pre-employment drug screening shown below. If one of the subjects is randomly selected, what is the probability that the test result is a false positive? Who would suffer from a false positive result? Why? Pre-Employment Drug Screening Results Positive test result Negative test result Drug Use Is Indicated Drug Use Is Not Indicated Subject Uses Drugs 42 11 Subject Is Not a Drug User 2 29 The probability of a false positive test result is (Round to three decimal places as needed.) Who would suffer from a false positive result? Why? O A. The person tested would suffer because he or she would be suspected of using drugs when in reality he or she does not use drugs. B. The employer would suffer because the person tested would not be suspected of using drugs when in reality he or she does use drugs. C. The person tested would suffer because he or she would not be suspected of using drugs when in reality he or she does use drugs. D. The employer would suffer…
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Suppose that 30 percent of an adult population have an infectious disease and 40 percent have achronic disease. Assume that having an infectious disease is independent from having a chronicdisease. For each of the questions below perform the calculation using appropriate statisticalnotation.a. What is the probability that a person selected at random will have both diseases?b. What is the probability of having the infectious disease for people with the chronic disease?c. What is the probability of having the infectious disease for people without the chronic disease?d. What is the probability of not having the infectious disease for people with the chronicdisease?
A dog allergy test for people has a 97.5% accuracy rate. Only 3% of the population has an allergy to dogs (actually it is much smaller than that!). Hint: Use a group of 100,000 people who've taken this test and the information provided to complete a table to answer the following question: If you have a dog allergy, what is the probability you will test positive? (Round your probability to the nearest tenth of a percent!) Probability = %
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