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The incidence of a certain disease in the population is estimated to be 1.0 %. That is, the probability that a randomly selected person having the disease is 0.01. A test for this disease is 95 % accurate; that is, it will positively identify a person who has the disease with a probability of 0.95. On the other hand, the test produces false positives with a probability of 0.04 . If a person tests positive for the disease, what is the probability that the individual actually has the disease ?
Construct a 95% confidence interval for the true proportion of the market who still refuse to visit any of the restaurants in the chain three months after the event.
Arbitrarily choose someone from sample. Determine the probability that they are Jewish and Democrat?
A range of values constructed from sample data so that the parameter occurs within that range at a specified probability is:
Four different assembly processes were under consideration. Sixteen workers were randomly assigned to the four processes, eight per process. The number of correctly assembled units in an eight-hour work shift was recorded:
A medium-size college town were surveyed, and it was found that 110 were regular voters. Estimate the true proportion of regular voters with 90% confidence.
The mean was 56 and the standard deviation was 20. On the second exam, she scored 82; the mean was 74 and the standard deviation was 5. On which exam did she do better?
In a study of how managers attempt to manage earnings, researchers analyzed a sample of 515 earnings- management attempts from a survey of experienced auditors. The frequency of effects is summarized in the table shown. Research question: At α..
In 1990, 5.8% of job applicants who were tested for drugs failed the test. At the 0.01 significance level, test the claim that the failure rate is now lower if a simple random sample of 1520 current job applicants results in 58 failures. Does the ..
The Greenberg public hearing meeting turned stormy. Citizens from four suburbs were gathered at city hall to try to get the city's federal funds for their own suburbs. The government recently awarded $750,000 to the city for road improvements. The..
What is the probability that 30% or fewer male employees will indicate that they have to pick up the slack for mom's working flextime ?
The entire batch will be rejected if at least one of those tested is defective. What is the probability that the entire batch will be rejected? Assume independence.
Use the Internet to find a website that shows an example or application correlation or regression in the area of your interest or in your profession. Discuss how correlation or regression was used and summarize your finding.
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