SOLUTION: The level of nitrogen oxides (NOX) in the exhaust of a particular car model varies with mean 0.9 grams per mile and standard deviation 0.2 grams per mile .
What sample size is n
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-> SOLUTION: The level of nitrogen oxides (NOX) in the exhaust of a particular car model varies with mean 0.9 grams per mile and standard deviation 0.2 grams per mile .
What sample size is n
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Question 1119795: The level of nitrogen oxides (NOX) in the exhaust of a particular car model varies with mean 0.9 grams per mile and standard deviation 0.2 grams per mile .
What sample size is needed so that the standard deviation of the sampling distribution is 0.01 grams per mile ?
You can put this solution on YOUR website! population mean is 0.9 grams and population standard deviation is 0.2 grams
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sample standard deviation is 0.01 grams
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pick a confidence level of 90%, for a confidence level of 90%, the critical value is 1.645
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acceptable error is 0.01/0.2 = 0.05
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sample size = ((1.645 * 0.05) / 0.01)^2 = 43.2964
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since we have a residual we round the sample size up to 44
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