Exp0 - Name of experiment Name of student Names of lab...

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Name of experiment Experiment 0: Statistics and Data Analysis Name of student Cia Li Names of lab partner or group members (if applicable) N/A Date 5/11/10 TA’s name Gialai Kooa Course number, lab section number, and lab room Chem241L, Section 503, Rm 420 Results and Calculations
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In this experiment, ten different pieces of filter paper were weighed using a laboratory balance and the data was recorded below. Paper # Mass (g) 9 0.632 10 0.641 8 0.641 4 0.640 3 0.634 7 0.610 6 0.637 5 0.632 11 0.626 2 0.637 Table 1: Experimental Paper Mass Data *observations* Statistical Measure Computed Value Number of Measurements 10 Sum 6.330 g Mean 0.633 g
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Standard Deviation 0.00937 g Table 2: Statistical Data Obtained from Data Analysis Sample Calculations = 0.632 + 0.641 + 0.641 + 0.640 + 0.634 + 0.610 + 0.637 + 0.632 + 0.626 + 0.637 = 6.330 g = n x i i = = 0.6 g s = = = 0.00937 g
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Questions and Calculations 1) Experimental Paper Mass Mean is: = n x i i = = 0.6 g Experimental Paper Mass Standard Deviation is: s = = = 0.00937 g Population Paper Mass Mean is: Population Paper Mass Standard Deviation is: 2)
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3) 95% Confidence Interval is: 99% Confidence Interval is: 4) 5a) The population data set gives a more accurate representation of the data because it includes data from each and every paper in the population of filter paper. The sample data set includes only a small fraction of paper data of the paper population. 5b) When the number of measurements increase, uncertainty decreases (inverse relationship)
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This note was uploaded on 10/11/2010 for the course CHEM 200 taught by Professor Rudolph during the Winter '08 term at University of North Carolina Wilmington.

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Exp0 - Name of experiment Name of student Names of lab...

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