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A blood test indicates the presence of a particulat disease 95% of the time when the disease is actually present. The same test indicates the presence of the disease 0.5% of the time when the dsease is not present. 1% of the population actually has the disease. Calculate the probability that a person has the disease given that the test indicates the presnce of the disease.
The answer is 0.657 but i need help getting there
Find the weighted mean of three test scores for a student (85, 90, 75) where the first test counts for 20%, the second test counts for 30%, and the third counts for 50% of the final grade.
false-positives in testing for hiv. a rapid test for the presence in blood of antibodies to hiv gives a positive result
Use the moving-average method to make seasonally-adjusted trend estimates for the third and fourth quarters of 2013 and the first two quarters of 2014. Assume that the cyclical and irregular forces have minimal influence on the time series. (Show d..
Suppose they solicit 400 customers one day, and find that 250 of them have a Grayson's card. Assume that 60% of all Grayson's customers have a discount card, what is the probability of getting a sample proportion of at least 250 / 400=0.625?
the mean height of adult women is 63.6 inches with a standard deviation of 2.5 inches. forty 40 women were asked their
a fair coin is tossed 25 times. calculate the chance of getting 17 heads and 8 tails.a. first use the normal
Jasmine is an African American graduate student. She is conducting research on the effects that affirmative action programs have had on American corporations.
R for my statistics class and need to write the code for this problem: "An experiment with four treatments and five replications of each treatment, which requires 20 experimental units. How many randomizations are possible for this experiment?..
Does the normal distribution yield a good approximation of the actual results?
Also, 72 percent of the managers have MBA degrees. Using the probability formulas, find the proportion of employees who either have MBAs or are managers.
To test whether the significant difference between two sample variance using F-tests.
a automobile manufacturer produces 77 of its cars at plant a. 5 of car made at plant a have a malfuction. what is
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