condition mean min max ZT0-3 0.3227198333333333 0.1625985 0.4473015 ZT4-7 0.19304269999999998 0.19304269999999998 0.19304269999999998 ZT8-11 0.5523865 0.5523865 0.5523865 ZT12-15 1.5565375000000001 1.51128 1.601795 ZT16-19 1.0125435 1.0125435 1.0125435 ZT20-23 0.757888 0.757888 0.757888