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A medical test for a certain disease is known to have sensitivity 98% ( probability of giving positive result to a carrier of the disease) and 92% specificity ( probability of giving negative result to a non-carrier of the disease). 4% of the population carries the disease. If an individual tests negative for the disease find the probability that the individual is not a carrier of the disease.
Last year, there were 30,000 students at a university; their GPA had a mean of 2.9 and an SD of 0.6. This year, in a simple random sample of 100 students taken from this university, the GPAs have a mean of 2.95 and an SD of 0.55. Has the mean GPA ..
then lengths of a certain component are normally distributed with a mean of 250 mm and a standard deviation of .6mm.
James Burke claims that about 70% of all single men would welcome a women taking the initiative in asking for a date. A random sample of 20 single men were asked if they would welcome a women taking the initiative in asking for a date.
using one mean z test to test whether or not to support the claim.the stats teacher believes the actual average amount
what is the post-test probability of disease being present in a patient with a positive test result for test A if a cutoff value of 4.0 mg/ml is chosen?
Calculate the probability that a random sample of 40 children's full-length movies produces an average length of 85 minutes or more.
a study was conducted by enron research to test for a difference inthe mean number of critical care patients in rooms
Assume salaries are normally distributed with a standard deviation of $4,500. What is the probability of a new graduate receiving a salary between $45,000.
Use the study to estimate the risk of an air bag fatality on a child seated on the front passenger seat.
You are asked to estimate the chance that the sum will be positive. Can you do it if you are also told the average and SD of the numbers in the box, but are not told the numbers themselves?
Find the probability that the mean weight of those loads is less than 44.24 tons. Assume that the variable si normally distributed.
according to u.s. news amp world report data in 1995 tuition costs at indiana university a public university were 2984
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