The included CSV files are all real-world data sets that are usable with the Nexosis API.
Locations A through C and Products A through C are specifically vetted for forecasting.
Location D is vetted for impact analysis, with an impact date range of 2015-10-11 through 2015-12-31.
The simplest way to get these data sets into your account is with a Url import. For the Url parameter, simply provide the 'raw' Github link to the file (e.g. https://raw.githubusercontent.com/Nexosis/sampledata/master/LocationC.csv)
Cardio dataset is a derivative of http://odds.cs.stonybrook.edu/cardiotocogrpahy-dataset/, with key and target fields added.