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1. When drawing from a population, which sample is likely to have more variance, a small sample or a large sample?
2. Do we use different formulas for calculating the population standard deviation and the sample standard deviation?
3. If you said yes to the above question, why do we use different formulas? If no, why not?
Technology on campus. Every 5 years the Conference Board of the Mathematical Sciences surveys college math departments. In 2000 the board reported that 51%.
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Calculate a 95% confidence interval for the average amount of trans fat per serving in all foods that are listed as having zero grams of trans fat per serving.
According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft, 23% of all complaints in 2007 were for identity theft.
Test appropriate hypotheses and state your conclusion.- The boxplots of the two distributions show an outlier among the data north of Derby. What effect might that have had on your test?
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Find the margin of error for this poll if we want 99% confidence in our estimate of the percent of American adults who do not use e-mail?
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If an attendee is selected at random and found to have arrived by train, what is the probability that the person is from Washington?
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