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The mean number of gallons of gasoline pumped per customer at Ray's Marathon Station is 9.5 gallons with a standard deviation of 0.75 gallons. The median number of gallons pumped is 10.0 gallons. The arithmetic mean amount of time spent by a customer in the station is 6.5 minutes with a standard deviation of 2 minutes.
a. According to chebyshev's Theorem, what proportion (percent) of the customers spend between 3.30 minutes and 9.70 minutes at the station?
b. According to the Empirical Rule, what proportion of the customers pump between 8.00 gallons and 11.00 gallons?
in conjunction with the housing foreclosure crisis of 2009 many economists expressed increasing concern about the level
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Find t (subscript alpha/2) for a confidence interval with 90% confidence and compute and interpret the margin of error "E" for a confidence interval with 90% confidence.
in a study of 299188 cell phone users it was found that 97 developed cancer of the brain or nervous system. assuming
Find the mean and standard error of the sample means that is normally distributed with a mean of 10 and a standard deviation of 2 and a sample size of 25.
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What proportion of the hearing loss in all the workers was attributable to not wearing earplugs?
Determine the regression line. What do the coefficients tell you about the relationship between the two variables? Does it appear that the errors are normally distributed? Explain.
Suppose wheat and sugar are two basic ingredients necessary to bake two items: a loaf of bread and a muffin. A baker has 25 pounds of wheat and 5 pounds of sugar.
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