condition mean min max ZT0-3 0.352689475 0.19508845 0.5102905 ZT4-7 1.5301749999999998 1.5301749999999998 1.5301749999999998 ZT8-11 1.8201049999999999 1.8201049999999999 1.8201049999999999 ZT12-15 0 0 0 ZT16-19 0.7670325 0.7670325 0.7670325 ZT20-23 0.706154 0.706154 0.706154