Class Meeting 03

Class Meeting 03 - CHEN 3010 Applied Data Analysis Class...

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1 CHEN 3010 Applied Data Analysis Class Meeting #3 August 31 st Topics Errors in measurements – Random & Bias Error propagation in calculations Descriptive statistics Graphical presentation Stem-and-leaf plots Histograms and Cumulative Frequency Reading for Thursday: pages 33-45 Homework #1 due Thursday, September 2nd
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2 Descriptive Statistics deterministic vs stochastic quantities/properties/variables true values of variable are statistical behave according to a distribution function Population (all values of variable – generally unknown) Sample Sample statistics and diagrams Type of distribution and its parameters + uncertainty measurements Issue: how big a sample to take?
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3 Type of distribution and its parameters + uncertainty of what use? predictions claims decisions
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4 Sample Statistics central value sample mean (average), median, mode dispersion sample standard deviation, S range others skewness kurtosis most frequently occurring value X X shows asymmetry of distribution shows peakedness/flatness of distribution (compared to normal distribution)
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Class Meeting 03 - CHEN 3010 Applied Data Analysis Class...

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