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Self-report survey
As part of Sallie Mae's recent credit card usage study, a self-report survey was distributed to 5800 undergraduates. Of the 292 returned surveys, only 249 were complete and used in the analysis. Based on these responses, the report states, "Ninety-two percent of undergraduate credit cardholders charged textbooks, school supplies, or other direct education expenses, up from 85 percent when the study was last conducted, in 2004.''
The reported margin of error is 4%. Do you think that this small margin of error is a good measure of the accuracy of the survey's results? Explain your answer.
What percent of these students are oldest or only children?- What percent of Humanities majors are oldest children?- What percent of oldest children are Humanities students?
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Makers of generic drugs are required to demonstrate that their generic drug does not differ significantly from the "reference" drug it is intended to imitate.
Draw a cumulative frequency distribution. - Forty percent of the buses were driven fewer than how many miles? -How many buses were driven less than 850 miles?
In multiple regression and correlation analysis, what is the purpose of the regression component? Of the correlation component?
The weekly proportion of storage tank capacity that is utilized at a regional hazardous liquid waste receiv ing site is an outcome of a Beta(8, 1) random variable. At the end of each week the storage tank is emptied. A random sample of a year..
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Construct a 90% confidence interval to estimate the difference of (average number of gallons sold on weekdays - average number of gallons sold on weekends). Assume the population standard deviations are the same for both weekdays and weekends.
a random variable x has the following probability distrubution.x fx0 0.081 0.172 0.453 0.254 0.05a. deterime the
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