Chapter 10 - Chapter 10 Graphs, Good and Bad Outline Data...

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Chapter 10 Graphs, Good and Bad
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Outline Data Tables Pie Charts & Bar Graphs Beware the Pictogram Change Over Time: Line Graphs Watch those scales Making Good Graphs
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Percentage Increase or Decrease of Common Stock Prices Stock prices increase consistently after 1982
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Values of $1000 Investment Which graph tells a better story? There are many ways to represent the economy with a picture
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Data Tables
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Definitions A categorical variable ’s values are groups or categories Blue or brown eyes Education – some college, no college, HS grad, etc > 40 yr old or < 40 yr old A quantitative variable takes on numeric values Height weight age Notice that any quantitative variable could be treated as a categorical variable. Why?
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Definitions The distribution of a variable tells us what values it can take on and how often it takes on these values. A data table is a summary of data in tabular form. Usually summarizes the distribution of a variable
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What values can the variable class take on? How is class distributed?
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This note was uploaded on 06/15/2011 for the course STAT 110 taught by Professor Johnson during the Fall '07 term at South Carolina.

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Chapter 10 - Chapter 10 Graphs, Good and Bad Outline Data...

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