Simpson's Paradox:
2011-09-17 13.59.53
Simpson's Paradox:
2011-09-17 14.00.23
Simpson's Paradox:
2011-09-17 14.00.10
Simpson's Paradox:
2011-09-17 13.59.53
Simpson's Paradox:
2011-09-17 13.59.36
Simpson's Paradox:
2011-09-17 13.59.06
Simpson's Paradox:
2011-09-17 13.58.50