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Unformatted text preview: Discussion Questions A. 1. The accuracy of the manufacturer tended to be about 0.1 g within the target 1.0 g. However the precision was fairly good because the actual mass of all the packets except for one were all close to 1.1 g with a standard deviation of .0604. If the manufacturer had said each packet contained 1.000 g then the accuracy would have been worse because the actual mass should be accurate to the thousandth place. 2. The inter-balance precision was fairly consistent (standard deviation was only .001 g), but it is still important to use only one scale during an experiment because even the slightest difference between scales can cause an even bigger difference in later calculations. B. 1. The serological pipet had the least precision with a standard deviation of .1254 mL. The graduated cylinder had the next best precision with a standard deviation of 0.02501 mL. The volumetric pipet had the best precision with a standard deviation of 0.01656 mL. Both the serological pipet pipet had the best precision with a standard deviation of 0....
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This note was uploaded on 10/26/2009 for the course CHEM 1310 taught by Professor Cox during the Spring '08 term at Georgia Institute of Technology.
- Spring '08