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Suppose that 4% of all tax returns are audited. In a group of n tax returns, consider the probability that at most two returns are audited.
How large must n be before this probability is less than 0.01?
HR Consulting surveyed a random sample of 74 Twin Cities construction companies to find information on the costs of their health care plans. One of the items being tracked is the annual deductible that employees must pay.
an experiment investigating the effect of exercise on happiness randomly assigns participants to one of four groups
A farmer has 40m of fencing with which to enclose a rectangular pen.Given that the pen is x m wide - show that it's area is (20x - x^2)m^2 and deduce that the maximum area that he can enclose (Answer given 100m^2).
A random sample of 500 participants was recruited for the study ? Subjects were allowed to elect to participate in an 3-month exercise program or serve as a control subject (190 chose the program, 310 chose to serve as controls)?
lie detectors are controversial instruments barred from use as evidence in many courts. nonetheless many employers use
Based on a 2007 survey of U.S. households (see www.census.gov), 87% (out of 3060) of males in Massachusetts (MA) have health insurance. a) Examine the conditions for constructing a confidence interval for the proportion males in MA who had health i..
question the student population at the state college consists of 55 females and 45 males.a. the college
Fifty-two percent of the students at a certain college are females. Five percent of the students in this college are majoring in computer science. Two percent of the students are women majoring in computer science. If a student is selected at rand..
A researcher is conducting proportionate stratified random sampling with a sample size of 250. Approximately how many people should be sampled from each stratum?
What are the chances of getting 15 days of rain during the next 30 days? What do you think about Joe's assumptions concerning the weather for the next 30 days?
a medical clinic in a small city in the state of washington wants to estimate the mean serum cholesterol level measured
Determine the Bayes decision assuming a uniform prior for the states of nature.
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