Perform Tests of Independence and Correlation
A series of factors was measured in 506 Boston suburbs with the intention of determining how these factors are related to home price. Significant correlations among factors such as nitrogen oxide concentration and median home price serve as a reminder that correlation does not imply causation.
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Kendall's 
matrix for the data.
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IndependenceTest suggests home values drop with increasing nitrogen oxide concentrations.
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The amount of nitrogen oxide is highly correlated with the level of industrialization.
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