Suppose it is estimated that out of about 2 million people in Perth whoare not in isolation, 100000 have a particular virus. Let A be the event that a personselected at random on a university campus has the virus.(a) Estimate the probability P(A).(b) If there are 8000 people on campus, how many do you expect to have the virus?(c) Let B be the event that the randomly-selected person tests negative using arapid-antigen-test which has a false negative rate of 20%. What is P(B|A)?(d) What is the probability that a person selected at random has the virus andtests negative?

Given: Out of 2 million people in Perth who are not in isolation, 100000 have a particular virus.…

Answered: Suppose it is estimated that out of…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Suppose you just received a shipment of twelve televisions. Three of the televisions are defective. If two televisions are randomly selected, compute the probability that both televisions work. What is the probability at least one of the two televisions does not work? The probability that both televisions work is (Round to three decimal places as needed.)
A group of people were asked if they had run a red light in the last year. 376 responded "yes", and 228 responded "no". Find the probability that if a person is chosen at random, they have run a red light in the last year.
Suppose that the probability that a child living in an urban area in the United States is obese is 20%. If a social worker sees 15 children living in urban areas, what is the probability that 5 are obese? Enter response as .xxxx
Suppose it is known that 5% of men age 50 and older I have prostate cancer. And a random sample of 25 men age 50 and older what is the probability that exactly to have prostate cancer?
Suppose that it is known that in a certain large population, 10 percent of the population is color blind. If a random sample of 25 people is drawn from the population, find the probability that exactly 8 of them are color blind.
A group of people were asked if they had run a red light in the last year. 478 responded "yes", and 254 responded "no".Find the probability that if a person is chosen at random, they have run a red light in the last year.
A Boston College survey consisted of 320 Michigan workers who were laid off between 1979 and 1984, I found that 20% had been out of work for at least two years. Suppose you were to select another random sample of 320 workers among all employees laid off between 1979 and 1984. Which It would be the probability that your sample percentage of unemployed workers. for at least two years, differs from the percentage obtained in the survey of Boston College, 5% or more?
In a certain population of people, 72% of the people have brown eyes and 28% of the people have blue eyes. What is the probability that two randomly selected people (not related to each other) from this population will have eyes of the same color? (Answer correctly to 3 decimal places.)
A researcher is selecting lab rats for her experiment. She assigns each rat a number and picks numbers out of a hat while blindfolded. The pool of rats from which she is drawing participants is composed of the following: 23 male albino rats 21 male spotted rats 35 female albino rats 11 female spotted rats If she reaches into the hat once, what is the probability of choosing a female rat or an albino rat? Give your answer as a decimal rounded to 4 decimal places.
The probability that an individual has 20-20 vision is 0.14. In a class of 77 students, what is the probability of finding exactly 5 people with 20-20 vision? assuming finding an individual with a 20-20 vision is independent of finding another individual with 20-20 vision.
Suppose that 35% of people own dogs. If you pick two people at random, what is the probability that they both own a dog?Give your answer as a decimal (to at least 3 places) or fraction
Suppose you want to estimate the probability that a patient will develop an infection while hospitalized at a particular hospital. In the past year, this hospital had 8,650 patients, and 812 of them developed an infection. What is the estimated probability that a patient at this hospital will develop an infection? 812 O P(the patient develops an infection) 8650 1 P(the patient develops an infection) = 8650 5738 O P(the patient develops an infection) 8650 O P(the patient develops an infection) = 812 812 O P(the patient develops an infection) 5738

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