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You conduct a water quality survey in western Washington sampling 26 streams and rivers for total inorganic

nitrogen and phosphorus concentrations (ug/L). The summary statistics are below. Construct the 90% confidence interval for the standard deviation of each element and interpret the results.


Nitrogen: Mean 557, Standard Deviation 422

Phosphorus: Mean 13.2, Standard Deviation 9.8

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(415.6442,... View the full answer

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Nitrogen : [420.87,... View the full answer

90% CI =( 0.9632 , 1.8835 ) Interpretation: Since 1... View the full answer

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