Find the probability of a correct result by finding the probability of a true positive or...

Find the probability of a correct result by finding the probability of a true positive or a true negative.

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orchestra answered 1 year ago

A test for a disease gives a correct positive result with a probability of 0.95 when...

A test for a disease gives a correct positive result with a probability of 0.95 when the disease is present but gives an incorrect positive result (false positive) with a probability of 0.15 when the disease is not present. If 5% of the population has the disease, and Jean tests positive to the test, what is the probability Jean really has the disease?

71. Use the table below to find the probability. Positive Test Result Negative Test Result Subject...

71. Use the table below to find the probability. Positive Test Result Negative Test Result Subject Uses Drugs 44 (True Positive) 6 (False Negative) Subject is Not a Drug User 90 (False Positive) 860 (True Negative) A. If 2 of the 1000 test subjects are randomly selected, find the probability that both had false positive results. Assume that the 2 selections are made without replacement. (Round to 4 decimals) B. If 3 of the 1000 test subjects are randomly selected,...

Somebody speculates that a person will test COVID 19 positive with probability 0.2. Then for finding...

Somebody speculates that a person will test COVID 19 positive with probability 0.2. Then for finding the probability for exactly 100 patients testing positive in a sample of 400 patients, how do you do continuity correction? In the above question, what is the required probability using normal approximation to binomial? What is the probability that at least 70 patients test COVID 19 positive?

7. Which of the following is true when finding the probability based on – sampling distribution?...

7. Which of the following is true when finding the probability based on – sampling distribution? A. Normality is given by BOTH the population being normal and n ≥ 30 B. Normality is given by BOTH np ≥ 5 and nq ≥ 5. C. We have to either add or subtract .5 to the x-value to make our answer more accurate. D. To find the standard error of the mean we take the population standard deviation and divide by the...

The sensitivity of a diagnostic test is the probability that a true positive (e.g. someone with...

The sensitivity of a diagnostic test is the probability that a true positive (e.g. someone with the disease under question) is correctly identified as such. The specificity, on the other hand, is the probability that a true negative (e.g. a healthy person) is not reported as a positive. You have a COVID-19 antibody test with specificity α and sensitivity β. There are N people in a particular population, and suppose we already know that n of them have the disease....

A diagnostic test has a probability of 92% of giving a positive result when applied to...

A diagnostic test has a probability of 92% of giving a positive result when applied to a person suffering from a certain disease. The test has a probability of 5% of giving a false positive when applied to a non-sufferer. If 6% of the population suffer from the disease, what is the probability of a positive test result?

A diagnostic test has a probability 0.95 of giving a positive result when applied to a...

A diagnostic test has a probability 0.95 of giving a positive result when applied to a person suffering from a certain disease, and a probability 0.10 of giving a (false) pos- itive when applied to a non-sufferer. It is estimated that 0.5% of the population are sufferers. Suppose that the test is now administered to a person about whom we have no relevant information relating to the disease (apart from the fact that he/she comes from this population). Calculate the...

The probability of getting a false-positive result for a single person, was 0.3%. What would be...

The probability of getting a false-positive result for a single person, was 0.3%. What would be the new approximate percentage probability of getting at least one false-positive result, if 650 people had been tested, instead of 550? What would be the new approximate percentage probability of getting at least one false-positive result, if 550 people are still tested, but the probability of getting a false-positive result for a single person was 0.4% instead of 0.3% ?

A diagnostic test has a 95% probability of giving a positive result when given to a...

A diagnostic test has a 95% probability of giving a positive result when given to a person who has a certain disease. It has a 10% probability of giving a (false) positive result when given to a person who doesn’t have the disease. It is estimated that 15% of the population suffers from this disease. (a) What is the probability that a test result is positive? (b) A person recieves a positive test result. What is the probability that this...

What is true of rent-seeking activities? a. They never have a positive result for the firm....

What is true of rent-seeking activities? a. They never have a positive result for the firm. b. They require no additional spending. c. They raise the cost of doing business. d. They decrease the costs of the firm. What will happen based on the higher the price set by a monopolist and the longer it is maintained? a. The level of costs will decrease. b. Fewer firms will use rent seeking activities. c. The sale of the firm will drop....

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