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Chem315%20012610

# Chem315%20012610 - Where is the true value In a replicate...

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Where is the true value? In a replicate analysis, the carbohydrate content of a glycoprotein is found to be 12.6, 11.9, 13.0, 12.7, 12.5 g of carbohydrate per 100 g protein. Find the 50 and 90 % confidence intervals for the carbohydrate content. 1) Calculate the average and standard deviation. 2) Determine the confidence intervals.

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( 29 ( 29 ( 29 ( 29 g g g g n ts x g s g x 4 . 0 5 4 . 0 132 . 2 5 . 12 1 . 0 5 4 . 0 741 . 0 5 . 12 4 . 0 5 . 12 ± = ± = ± = ± = ± = ± = = μ 4.
Grams of nitrogen rich gas isolated by Lord Rayleigh From Air From Chemical Decomposition 2.31017 2.30143 2.30986 2.29890 2.31010 2.29816 2.31001 2.30182 2.31024 2.29869 2.31010 2.29849 2.31028 2.29889 Avg.= 2.31010 2.29947 s= +/- 0.0014 +/- 0.00137 Is the mass of nitrogen isolated from dry air different from the mass of the same volume of nitrogen isolated from chemical decomposition of N 2 O? Lord Rayleigh postulated that these should be the same if dry air was composed of only one fifth oxygen and four-fifths nitrogen. So he compared their densities (measured the masses of equal volumes of gas). There is a difference of only 0.46%. Was this significant?

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