condition mean min max ZT0-3 0.014867866666666667 0.0 0.02692125 ZT4-7 0.03399855 0.03399855 0.03399855 ZT8-11 0.026348999999999997 0.026348999999999997 0.026348999999999997 ZT12-15 0.060703025 0.05336505 0.068041 ZT16-19 0.0579098 0.0579098 0.0579098 ZT20-23 0.03762855 0.03762855 0.03762855