#fsdb slope intercept confcoeff n
# Anscombe's Quartet
# from F.J. Anscombe, "Graphs in Statistical Analysis," American Statistician, 27 (February 1973), 17-21.
# via http://en.wikipedia.org/wiki/Anscombe%27s_quartet
0.49991 3.0017 0.81652 11
#   | dbcolsregression iv_x iv_y
