Lesson 7 &amp; 8

Lesson 7 &amp; 8 - Scatterplots Stat113 Click to edit...

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Click to edit Master subtitle style 2/16/11 Scatterplots Stat113

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2/16/11 Exam 1 Stats Mean: 158 79% Std Dev: 17.6 8.8% Median: 160 80% IQR: 20 (= 170-150)10% Min: 120 60% Max: 180 90% Range: 60 30%
2/16/11 Scatterplots Graphically displays individuals based on their values for two variables Plots each individual as a point on the x-y coordinate plane X-coordinate: value for variable 1 Y-coordinate: value for variable 2

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9.00 9.75 10.50 11.25 12.00 825 900 975 1050 Mortality E d u c a t i o n For example…
2/16/11 Each point represents a U.S. city How far a given point is toward the right of the graph depends on how high the mortality rate is for the city it represents. How far above the x-axis a given point is depends on the average HS grade level completed by residents of that city 9.00 9.75 10.50 11.25 12.00 825 900 975 1050 Mortality E d u c a t i o n - The highlighted point has coordinates: (954.44, 10.7) - So the mortality rate for highlighted city is 954.44, and on average Interpreting the points

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2/16/11 Observing Patterns 9.00 9.75 10.50 11.25 12.00 825 900 975 1050 Mortality E d u c a t i o n What can you say about the education level for cities that have some of the lowest mortality rates? What about those with higher mortality rates? - It seems like the cities with lower mortality rates tend to have higher education levels - It seems like the cities with higher mortality rates tend to have a lower education level - Why might this be? Are there any exceptions to this
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This note was uploaded on 02/15/2011 for the course STATISTICS 113 taught by Professor Cassidy during the Fall '10 term at CUNY Hunter.

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Lesson 7 &amp; 8 - Scatterplots Stat113 Click to edit...

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