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  3. 7. a student measures the mass percent chloride in

7. A student measures the mass percent chloride in their unknown four times by each of...

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Basic Math

7. A student measures the mass percent chloride in their unknownfour times by each of two methods. (a) Find the mean, standarddeviation, and 95% confidence limit for each method. (b) Determineif each method’s result is “significantly” different from theexpected value of 48.86% Chloride. (c) Use the F test to decidewhether the standard deviations are “significantly” different. (d)Use the t test to decide whether the means are different from oneanother at the 95% confidence level.

Method Replicate Measurements

A 47.62% 47.91% 47.83% 47.79% 48.01%

B 47.11% 49.63% 48.72% 49.17% 47.99%

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