A covid-19 test manufacturer is testing its newest instant test. It tests a total of 500...

A covid-19 test manufacturer is testing its newest instant test. It tests a total of 500 people, 100 of whom are known to be have the virus. The following table shows the results:

	Have virus (V)	Do not have virus (V’)	Total
Test is positive (T)	90	40	130
Test is negative (T’)	30	160	190
Total	120	200	320

Find the probability that a person has the virus but tests negative.
Find the probability that a person who has the virus tests negative.
Find the probability that a person who tests negative has the virus.
An acquaintance of yours has a negative test result. What is the probability that she does not have the virus?

Solutions

Expert Solution

Answer:

given Data

A covid - 19 test manufacturer is testing its newest instant test.

It tests a total of 500 people , 100 of whom are known to be have the virus.

	Have virus (V)	Do not have virus(V')	Toatl
Test is pasitive(T)	90	40	130
Test is negative (T’)	30	160	190
Total	120	200	320

a) Find the probability that a person has the virus but tests negative.

P(Person has the virus but tests negative)

= 0.0938

b) Find the probability that a person who has the virus tests negative.

P(Person who has the virus tests negative)

= 0.25

c) Find the probability that a person who tests negative has the virus .

P(Person who tests negative has the virus)

= 0.1579

d) An acquaintance of yours has a negative test result. What is the probability that she does not have the virus?

P(Person who does not have the virus)

= 0.8421

***Please like it....It is important to me

Thank you... For supporting me..

orchestra answered 1 year ago

Next > < Previous

Related Solutions

Please discuss current COVID-19 testing platforms. what tests are currently available? how accurate are these methods?...

Please discuss current COVID-19 testing platforms. what tests are currently available? how accurate are these methods? explain the emergency use authorization designation by the FDA, and why it is significant as it applies to Covid -19 testing

Antibody tests for the Covid-19 virus are not perfect. In New York City, 19% of the...

Antibody tests for the Covid-19 virus are not perfect. In New York City, 19% of the population are believed to have been infected with the virus. If the sensitivity of a test is 88.89%, and the false positive rate is 5.86%, what is the probability that a person has the antibodies, given that person got a positive result? Round your answer to the nearest percent. For example, enter 80 for 80 percent.

What is a COVID-19 Diagnostic Test and how is it performed? What is a COVID-19 Antibody...

What is a COVID-19 Diagnostic Test and how is it performed? What is a COVID-19 Antibody Test and how is it performed? What is the major difference between the two tests?

ELISA and nucleic acid tests (i.e. PCR) have been created to test for COVID-19. Many countries...

ELISA and nucleic acid tests (i.e. PCR) have been created to test for COVID-19. Many countries have had issues providing and managing tests for the virus. Given your understanding of the tests and the disease, state which test you would use to diagnose a possible COVID-19 infection and why you would choose this test over the other.

write a principal of ID Now covid 19 test?

A major smartphone manufacturer is launching the newest version of its mobile phone. The company has...

A major smartphone manufacturer is launching the newest version of its mobile phone. The company has media advertising planned already, but it is considering complementing it with a public relations (PR) campaign. Discuss the target audience, the objectives, and the advantages of a PR campaign? 600 words A major smartphone manufacturer is launching the newest version of its mobile phone. The company has media advertising planned already, but it is considering complementing it with a public relations (PR) campaign. Discuss...

Because of the outbreak of Covid-19, the S&P 500 stock index fell over 30% from its...

Because of the outbreak of Covid-19, the S&P 500 stock index fell over 30% from its recent high level. At the same time, the volatility index of the S&P 500 (a measure of the market's expectation of 30-day forward-looking volatility) spiked from 14 to 80. Assume that in December 2019 (before the outbreak of the Covid-19) the expected growth rate of the index was 5%, the discount rate was 10%, and the risk-free rate of return was 3.5%. Also, assume...

You are testing the efficacy of a treatment for COVID-19 in two different countries and have...

You are testing the efficacy of a treatment for COVID-19 in two different countries and have collected data in the following table. Country A Country B 314 303 339 322 328 317 302 331 Conduct an ANOVA test at a 0.05 level of significance to determine if there is any difference between the means.

You are testing the efficacy of a treatment for COVID-19 in two different countries and have...

describing the techniques introduced in the Immunology lab and how it relates to COVID 19 testing...

describing the techniques introduced in the Immunology lab and how it relates to COVID 19 testing and research. all the laboratory techniques and compare and contrast on what can be learned from each of the assays and discuss why multiple assays may be advisable. Refer to literature to support your conclusions and cite at least 3 peer reviewed sources. Methods Review Clear and concise description of assays performed in Immunology lab as it relates to COVID 19 testing and research...

Subjects