s	a	b
count	50.000000	50.000000	50.000000
mean	0.250000	0.260000	0.220000
std	0.178571	0.443087	0.418452
min	0.000000	0.000000	0.000000
25%	0.125000	0.000000	0.000000
50%	0.250000	0.000000	0.000000
75%	0.375000	0.750000	0.000000
max	0.500000	1.000000	1.000000