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Statistics (14)
STAT 1770 (14)
Lecture

September 20.docx

2 Pages
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Department
Statistics
Course Code
STAT 1770
Professor
John Sheriff

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Description
September 20, 2013 Chapter 3 Sec 3­8 Pages 51­66 Mean • Uses every observation • Affected by skewness/outliers • Nice statistical properties Median • Ignores most observations • Not greatly affected by skewed/Outliers • May not be useful if data concentrated on just a few values ­ If data is roughly symmetrical: mean ~ median ­ If data is right skewed: Mean > median ­ If data is left skewed: mean
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