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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?
Test for normality using α= 0.05. What inferences can you draw?- Estimate the mean and standard deviation of the waiting times.
low reliability of the variables reduces the correlation coefficient becausea. the deviation scores are less likely to
If net income, total assets, and book value of equity stayed the same, what would be the effect on the DuPont Identity of an increase in sales?
1.last week john quinn sat back in a chair with his feet on his deck and nodded at his wife kate. they had just
If this information is based on two independent random samples of 200 viewers each, test for equality of proportions using α = 0.05.
Find a 95% confidence interval for the true mean depth of the upper mantle in this farming region, and interpret your result.
Use the same information about Jeannie in the above problem. What travel time corresponds to the 96th percentile of Jeannie's trips to the airport. Round your final answer to the nearest minute, then input that whole number below.
question in a phone central we observe every minute if certain phone line is or is not occupied. in this way it has
Find the standard deviation from its definition. That is, find the distance of each observation from the mean, square the distances.
owner of a store that sells cds wants to estimate the mean amount of time a customer remains in the store. a random
Assume that female students' heights are normally distributed with a mean given by µ = 67.2 in. and a standard deviation given by σ = 3.6 in.
Find the 90% confidence interval for the mean number of peaches per tree. How many trees does she need to sample to be accurate within 10 peaches per tree?
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