condition mean min max ZT0-3 0.45239349999999995 0.30583499999999997 0.6087644999999999 ZT4-7 0.7822775 0.7822775 0.7822775 ZT8-11 0.6523675 0.6523675 0.6523675 ZT12-15 1.307222 0.9896240000000001 1.6248200000000002 ZT16-19 0.6836315 0.6836315 0.6836315 ZT20-23 0.797552 0.797552 0.797552