To compare two distributions can construct a back to back stem and leaf display

To compare two distributions can construct a back to

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To compare two distributions, can construct a back-to-back stem-and-leaf display Uses the same stems for both One leaf is shown on the left side and the other on the right 135
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Sample Back-to-Back Stem-and-Leaf Display 136
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Back-to-Back histogram Display Comparing Two Distributions with back-to- back bar charts 137
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Back-to-Back histogram Display Comparing Two Distributions with back-to- back bar charts 138
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Scatter Plots Used to study relationships between two quantitative variables Place one variable on the x-axis Place a second variable on the y-axis Place dot on pair coordinates 139
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Types of Relationships Linear : A straight line relationship between the two variables Positive : When one variable goes up, the other variable goes up Negative : When one variable goes up, the other variable goes down No Linear Relationship : There is no coordinated linear movement between the two variables 140
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A Scatter Plot Showing a Positive Linear Relationship 141
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A Scatter Plot Showing a Little or No Linear Relationship 142
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A Scatter Plot Showing a Negative Linear Relationship 143
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Misleading Graphs and Charts: Scale Break Mean Salaries at a Major University, 2004 - 2007 Break the vertical scale to exaggerate effect 144
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145 Misleading Graphs and Charts: Horizontal Scale Effects
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146 You can use simple mathematical operations (like averages) to create nonsensical “facts” that can drive whatever agenda you’d like. Example: the average wealth of the citizens of a particular town is $100,000, therefore they don’t need any government assistance. (The town consists of 1 stingy millionaire and 9 homeless people.)
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  • Fall '19
  • Frequency, Frequency distribution, Bar chart, Histogram

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