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It has been reported that 80% of taxpayers who are audited by the Internal Revenue Service end up paying more money in taxes. Assume that auditors are randomly assigned to cases, and that one of the ways the IRS oversees its auditors is to monitor the percentage of cases that result in the taxpayer paying more taxes.
If a sample of 400 cases handled by an individual auditor has 77.0% of those she audited paying more taxes, is there reason to believe her overall "pay more" percentage might be some value other than 80%? Use the 0.10 level of significance in reaching a conclusion. Determine and interpret the p-value for the test.
The largest salary on the list is $100,000 and is accidentally changed to $1,000,000. What is the new standard deviation?
Reconsider the port alcohol content data from Exercise 14.22. A normal probability plot casts some doubt on the assumption of population normality. However, a dotplot shows a reasonable amount of symmetry, and the mean, median, and 5% trimmed mean..
What is the probability of a flood of that magnitude or greater occurring during the next year - what is the probability of it not occurring during the next year?
Determine the dimensions of resulting exchanger?
Firm. You've been hired as an economic consultant by an unprofitable price-taking firm that produces baseball caps. The firm already has a factory, so it is operating in the short run.
A telephone survey utilized a sampling frame of 2000 numbers, and had a response rate of 25%. A question asked respondents if they preferred Brand 1, Brand 2, or Brand 3.
A test indicates the presence of a particular disease 90% of the time when the disease is present and the presence of the disease 2% of the time when the disease is not present.
1.a recent study investigated the extent to which hypertension is affected by alcohol consumption. among other things
as an occupational health epidemiologist you are required to measure the effect of stress on the workers in your
According to the National Association of Homebuilders, the average life expectancies of a dishwasher and a garbage disposal are about the same: 10 years.
a firm seeks to receive a return of 12 on an investment of 100000. if potential profits are normally distributed with a
Out of the students in a particular class, 25% are left-handed, 60% are fans of the Cleveland Cavaliers, and 10% fall into both categories. What is the probability a randomly selected student neither left-handed nor a fan of the Cleveland Cavalier..
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