Mathematics, 23.10.2019 05:00 labrandonanderson00
Alimnologist wishes to estimate the mean phosphate content per unit volume of lake water. it is knownfrom studies in previous years that the standard deviation has a fairly stable value ofσ= 4. how manyindependent water samples must the limnologist analyze to be 90% certain that the error of estimation [halfwidth of 90% confidence interval] does not exceed 0.8 milligrams?
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Alimnologist wishes to estimate the mean phosphate content per unit volume of lake water. it is know...
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