554 THE BELL SYSTEM TECHNICAL JOURNAL, MARCH 1957 



1400 



1200 



1000 



800 



600 



400 



200 



3 4 5 6 



8 10 



k 



20 30 40 50 60 80 100 



Fig. 11. — Number of units n required per process to guarantee a probability 

 of P* = 0.85 of selecting the best of k binomial processes when the true differ- 

 ence p[i] — p[2i is at least d*. 



1400 



1200 



1000 



800 



600 



400 



200 



K^^ig^----^^- 



3 4 



8 10 



k 



20 30 40 50 60 80 100 



Fig. 12 — Number of units n required per process to guarantee a probability of 

 P* = 0.90 of selecting the best of A; binomial processes when the true difference 

 Pfi) ~ V\i\ is at least d*. 



