condition mean min max ZT0-3 0.15285749999999998 0.1509355 0.1547795 ZT4-7 0.2048085 0.2048085 0.2048085 ZT8-11 0.36255899999999996 0.36255899999999996 0.36255899999999996 ZT12-15 0 0 0 ZT16-19 0.354066 0.354066 0.354066 ZT20-23 0.101445 0.101445 0.101445