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You are the administrator for a drug screening program. The drug screening test correctly detect the presence of drugs 99.8% of the time. The test will falsely detect the presence of drugs 1.5% of the time. Assuming that a random person has a 0.5% chance they use drugs, answer the following:
Note: P(test positive | drugs present) = .998
P(test positive | drugs not present) = .015
P(drugs present) = .005
a. What is the probability a test comes back positive for drugs?
How do you go about calculating different probabilities--say an item was selected at random and we wanted to know how far it is from the mean or the probability that it is at least 4.5 or more?
The parts of this exercise concern the variable Alcohol, which is data for number of alcoholic beverages consumed in a typical week as reported by n = 167.
Suppose that one was unsure about the 0.1 probability given above and want to estimate the probability of making an A. If a random sample of 30 students resulted in six who made A, what would you estimate the probability of making an A to be?
can you please help with this question? thank youyou want to determine the average number of hours worked by professors
Suppose that a new treatment for a certain disease is given to a sample of 200 patients. The treatment was successful for 166 of the patients.
Life Expectancy 2004. Data from the World Bank for 26 Western Hemisphere countries can be used to examine the association between female Life Expectancy.
Find the marginal probabilities, are Disney and Amazon stock returns independent and what is the mean and variance of the stocks D and A?
The Dean of Students believes that the costs are greater this semester. What is the test value for this hypothesis?
The width of a 95% confidence interval for µ is 10 units.- If everything else stays the same, how wide would a 90% confidence interval be for µ?
Write a substantive interpretation of the following unstandardized regression equation based on a sample of 743 city residents, where Y is a 10-point scale measuring the number of professional sporting events.
Construct a 95% confidence interval for the average amount its credit card customers spent on their first visit to the chain's new store in the mall assuming that the amount spent follows a normal distribution.
Provide a 95% interval estimate of the real occupancy rate with an average room rate of $90.
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