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The mercury in a fish sample is determined to be 1.80, 1.58 and 1.64 ppm. Calculate...

The mercury in a fish sample is determined to be 1.80, 1.58 and 1.64 ppm. Calculate the 80% and 95 % confidence limits for (a) the first entry (1.80 ppmHg) and (b) the mean value (1.67 ppmHg) assuming s →σ = 0.1.

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