Postlab1 - L aura Lanier Lab L2 Post Lab#1 Discussion Questions A 1 The manufacturer is not very precise because the standard deviation is 5.509 w

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Laura Lanier Lab L2 September 11, 2009 Post- Lab #1 Discussion Questions A. 1. The manufacturer is not very precise because the standard deviation is 5.509, which is large. Only one of the sugar packets is accurate, measuring at 1.005g, which would be 1.0g with less significant figures, but on the whole, the manufacturer is not very accurate either, as the percent error is 8.02%, which is rather large. If the manufacturer had stated that each packet contained 1.000g of sugar, it would be even less accurate because the packets would be very far from the stated mass on the packet. 2. The inter-balance precision is very good because four of the five pieces of data are the same with only one small variance and the standard deviation is relatively small, being only .0447. Despite this, only one balance should be used while experimenting because balances can be knocked out of calibration easily and by using the same balance, all of the data will be more precise relative to each other. The calibration on a balance will not change during an experiment but it can change from balance to balance. B.
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This note was uploaded on 09/12/2011 for the course CHEM 1310 taught by Professor Cox during the Fall '08 term at Georgia Institute of Technology.

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Postlab1 - L aura Lanier Lab L2 Post Lab#1 Discussion Questions A 1 The manufacturer is not very precise because the standard deviation is 5.509 w

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