Source: | D.J. Hand, F. Daly, A.D. Lunn, | Handbook of Small Data Sets | |
K.J. McConway, and E. Ostrowski |
This book contains 510 data sets; all are on-line, but you'll want to read Hand et al.'s "story" about the data to help you understand the experiment where the data arose and help you formulate an appropriate hypothesis.