Click here to see the SAS code.
Click here to see the example.


This is a SAS/Graph version of the plot in this blog:
Using data prepared by Xan Gregg (From the SAS JMP group)

I think my dotted reflines that only extend below the data are 
less clutter-some, and easier to read.

Also, the original blog had several versions with 'regression'
lines ... whereas I think it's better to just look at the raw
data, and let your eyes form their own conclusion :)

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