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1. Exploratory Data Analysis
1.3. EDA Techniques
1.3.3. Graphical Techniques: Alphabetic Scatter Plot

Scatter Plot: No Relationship

Scatter Plot with No Relationship scatter plot showing no relationship
Discussion Note in the plot above how for a given value of X (say X = 0.5), the corresponding values of Y range all over the place from Y = -2 to Y = +2. The same is true for other values of X. This lack of predictablility in determining Y from a given value of X, and the associated amorphous, non-structured appearance of the scatter plot leads to the summary conclusion: no relationship.
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