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by: Brady Spinka


Marketplace > University of Texas at Austin > Chemistry > CH 204 > INTRO TO CHEMICAL PRACTICE
Brady Spinka
GPA 3.98

Brian Anderson

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About this Document

Brian Anderson
Class Notes
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This 9 page Class Notes was uploaded by Brady Spinka on Monday September 7, 2015. The Class Notes belongs to CH 204 at University of Texas at Austin taught by Brian Anderson in Fall. Since its upload, it has received 7 views. For similar materials see /class/181867/ch-204-university-of-texas-at-austin in Chemistry at University of Texas at Austin.




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Date Created: 09/07/15
6amp5065 f 39 CH204I EXperiment 1 v 7mmummon 1 39 Snring2007 Aretha Densities jog j u 39 39 f Cokevan d Diet Coke quot VIImeant 7 5iuoo bu oioitooop Today Random error in experimental data Calculating standard deviation Reporting significant digits Quick look at Experiment OOOOOOOO OOOOOOOOOOOO0006 But rst Sections 53215 and 53315 Yushan Yeh is out Ashley Garcia is in Stay tuned for any changes in the TA office hour schedule OOOOOOOO OOOOOOOOOOOO0006 AAOA A 0 A Q 0 0 0 0 A 0A A 0 A 0A A A A AA AA 0 0 A A 0 0 A A C 0 i 0 0A 0A Weigh a few more 57128 56947 57085 56907 56106 56339 56009 57205 56466 57195 Now what does a quartet weigh Average 567387 OOOOOOOO OOOOOOOOOOOO0006 Every data point is an estimate But how good of an estimate is it If we don t know the true value how do we know how much variability random error there is in our measurement 0000000000000000000000006 There s gotta be a better way There is Calculate the average it standard deviation Standard deviation is a measure of the scatter in the data and it also tells us how many decimal places we should keep in our average OOOOOOOOOUOOOOOOOOOUOO0000 What is Standard Deviation It s a calculation based on a set of data points that tells us how widely the data points are scattered around the average 2 II1 1 Q 7 g r r r 39 O I 7 Q 39 7 r a 39 0 x mumghg Rattan Masmwnmul1 rbmswmml lsmdmml


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