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5 Cards in this Set
- Front
- Back
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Examine scatterplot of bivariate data
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If relationship exists then we look for
Direction,Form,Strength. |
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Direction
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Positive: If X increases as Y increases
Negative: If X increases and Y decreases ot vice versa. |
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Form
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Linear: Straight line or not
Non-linear: Curvature or Quadratic(u shaped) or cubic or exponenial(half u) |
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Strenght of relationship
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Strong: concentrated around form
Weak: points loosely scattered about form |
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Adding a categorical variable
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The relation b/w the individual categorical variables is stronger than the cumulative analysis of all categorical variables together. e.g of hot dogs in CD.
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