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An article in The Economist compares divorce procedures in New York to those in England, France and Germany.
Suppose the following data are available for these places on numbers of divorces, broken down by whether a prenuptial agreement had been signed.
Prenuptial agreement: New York 8,049 England 17,139 France 3,044 Germany 1,014
No prenuptial agreement: New York 75,113 England 25,108 France 19,800 Germany 161131
In light of these data, are the percentages of divorcing couples with prenuptial agreements equal in these four places?
Time spent using e-mail per session is normally distributed, with μ = 8 minutes, and σ = 2 minutes. If you select a random sample of 25 sessions,
Using the 0.10 level of significance, is there evidence that the population mean is above $300?
Vehicles heading west on Front Street may turn right, left or go straight ahead at elm street. The city traffic engineer believes that half to the vehicles will continue straight through the intersection.
A car rental office checks out an average of 30 cars per day with a standard deviation of 8 cars. If a sample of 25 days of operation is selected and the sample mean is computed.
The president of Doerman Distributors, Inc., believes that 30% of the firm's orders come from first-time customers. A random sample of 100 orders will be used to estimate the proportion of first-time customers. Assume that the president is correct..
A study on body types gave the following results: 45% were short; 25% were short and overweight; and 24% were tall and not overweight.
Suppose that 40% of participants consume caffeine and smoke. if 8 participants are evaluated, what is the probability that: a) Exactly half of them consume caffeine and smoke?
Which of the given is the example of a discrete random variable? Which of the given is an example of continuous random variable?
What sample size must you take to be 96% confident that the results will be within $.75 of the true mean cost per call?
how many individuals will I need to sample if I want a 95% margin of error to be no more than 3%, I want to know if the results are significant at = 10%. With the information given.
What id Steve's grade point average at graduation and what is Steve's median grade point at graduation
The director of Heating and Oil at Superior Oil Company is concerned about the high cost of home heating oil being offered to their customers for the upcoming Fall season in Philadelphia, PA.
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