References/Notes/Attributions:
Source
Data from ftp://sidads.colorado.edu/DATASETS/NOAA/G02135/Sep/N_09_areaV2.txt updated data from
Witt, G. (2103) "Using Data from Climate Science to Teach Introductory Statistics," JSE 21:1 available at www.amstat.org/publications/jse/v21n1/witt.pdf