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) with 1 line per subject. Variables/Columns Subject id 1-8 Dose 0 time 9-16 Dose 5 time 17-24 Dose 9 time 25-32 Dose 13 time 33-40