The standard deviation for a method of measuring the concentration of nitrate ions in water is known

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The standard deviation for a method of measuring the concentration of nitrate ions in water is known to be 0.05 ppm. If 100 measurements give a mean of 1.13 ppm, calculate the 90% confidence limits for the true mean.

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Business Statistics Using Excel

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Authors: Glyn Davis, Branko Pecar

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Question Posted: Nov 25, 2023 04:43 AM

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The standard deviation for a method of measuring the concentration of nitrate ions in water is known

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