1.
Exploratory Data Analysis
1.3. EDA Techniques 1.3.3. Graphical Techniques: Alphabetic 1.3.3.26. Scatter Plot


Scatter Plot Showing Strong Positive Linear Correlation  
Discussion  Note in the plot above of the LEW3.DAT data set how a straight line comfortably fits through the data; hence a linear relationship exists. The scatter about the line is quite small, so there is a strong linear relationship. The slope of the line is positive (small values of X correspond to small values of Y; large values of X correspond to large values of Y), so there is a positive corelation (that is, a positive correlation) between X and Y. 