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A college believes that 24% of applicants to that school have parents who have remarried. How large a sample is needed to estimate the true proportion of students who have parents who have remarried to within 3% with 90% confidence?
a corporation has 11 manufacturing plants. of these 7 are domestic and 4 are located outside the united states. each
Engineers want to design seats in commercial aircraft so that they are wide enough to fit 98% of all males. (Accommodating 100% of males would require very wide seats that would be too expensive.)
according to a government study among adults in the 25- to 34-year age group the mean amount spent per year on reading
probability based on addition rule.a sample of automobile dealerships found that 19 of automobiles sold are silver 22
suppose you are given data from a survey showing the iq of each person interviewed and the iq of his or her mother.
Where should the warranty limits be set so that only 10% of the TVs need repairs at the manufacturer's expense?
Mmaximum error of estimate was 30. if he were to conduct a second study to reduce the maximum error of estimate to 6, about how many hard drives.
1.a company makes molded plastic toys. they study the plastic injection process into the molds. a common cause of
what is meant by independent samples? provide a research example of two independent
cholesterol values are obtained in a group of people before and after being given a drug. we want to test whether the
during a national debate on changes to health care a cable news service performs an opinion poll of 500 small-business
JBGHI demands a sample large enough to ensure an error of ± 2% with 90% confidence. What is the necessary sample size?
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