1.
Exploratory Data Analysis
1.3. EDA Techniques 1.3.3. Graphical Techniques: Alphabetic 1.3.3.15. Lag Plot


Lag Plot  
Conclusions 
We can make the following conclusions based on the above plot.


Discussion  The lag plot shown above is for lag = 1. Note the absence of structure. One cannot infer, from a current value Y_{i1}, the next value Y_{i}. Thus for a known value Y_{i1} on the horizontal axis (say, Y_{i1} = +0.5), the Y_{i}th value could be virtually anything (from Y_{i} = 2.5 to Y_{i} = +1.5). Such nonassociation is the essence of randomness. 