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(Lesson 5: Measures of Center; 32)
3.08
Comparing Mean and Median
The mean is more often used in formulas.
Trimmed means
can be used to reduce the effect of outliers. For example, a
10% trimmed mean is obtained by taking the average of the data set after the
bottom 10% and the top 10% of the sorted data values have been deleted.
A distribution of test scores, especially near the beginning of the term, might
look as follows:
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Unformatted text preview: Why is the mean lower than the median in this case? What typically happens to exam means and medians as the term progresses? Case Study : According to the George W. Bush administration, the tax cuts they proposed led to an average tax cut per family of $1439. The Democrats claimed that the median tax cut was $600. Who is right? Can you explain this discrepancy? (Source: Citizens for Tax Justice.)...
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This note was uploaded on 12/29/2011 for the course MATH 119 taught by Professor Kim during the Fall '09 term at SUNY Stony Brook.
 Fall '09
 KIM
 Formulas

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