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Part 2 Exploratory Data AnalysisChapter 3 Describing Data: Numeric Descriptive Statistics

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• Introduction– Location– Dispersion– Skewness

• Central Location Measures– Arithmetic Mean (Average)– Median

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• Central Location Measures continued– Mode– Which central location

measure is best?

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• Non-central Location Measures– Quartiles– Percentiles

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• Measures of Dispersion– Range– Variance

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• Measures of Dispersion continued– Standard Deviation– Coefficient of Variation

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• Measure of Skewness– Symmetrical Distribution– Positively Skewed Distribution

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• Measure of Skewness continued– Negatively Skewed Distribution– Pearson’s Coefficient of Skewness

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• The Box Plot

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• Choosing Valid Descriptive Statistics Measures• Using Excel (2007) to Compute Descriptive

Statistics– Function Keys– Data Analysis Add-in

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• Summary• Exercises

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Applied Business Statistics Methods and Excel-based Applications

Third edition

TREVOR WEGNER ISBN 978-0-70217-774-3

End of Chapter 3