condition mean min max ZT0-3 0.23571999999999999 0.23571999999999999 0.23571999999999999 ZT4-7 0.3042085 0.3042085 0.3042085 ZT8-11 1.024707 1.024707 1.024707 ZT12-15 4.186545 4.186545 4.186545 ZT16-19 1.434335 1.434335 1.434335 ZT20-23 0.4744995 0.4744995 0.4744995