Dataset:  caffeine.dat

Source: W.J. Pasman, M.A. van Baak, A.E. Jeukendrup, A. de Haan (1995).
"The Effect of Different Dosages of Caffeine on Endurance Performance Time",
International Journal of Sports Medicine, Vol. 16, pp225-230.

Description: Endurance Times for nine well-trained cyclists, on each
of 4 doses of caffeine (0,5,9,13 mg)

Variables/Columns

Subject id   1
Dose        5-6
endurance time 10-14  /* minutes until exhaustion at 80% Wmax on cycle  */