condition mean min max ZT0-3 0.7329866666666667 0.7329866666666667 0.7329866666666667 ZT4-7 0.00861305 0.00861305 0.00861305 ZT8-11 0.684395 0.684395 0.684395 ZT12-15 0.39524699999999996 0.39524699999999996 0.39524699999999996 ZT16-19 1.3387200000000001 1.3387200000000001 1.3387200000000001 ZT20-23 0.9668233431 0.9668233431 0.9668233431