condition mean min max ZT0-3 364.67000695 362.8974693 366.4425446 ZT4-7 412.192899725 405.4185787 418.96722075 ZT8-11 597.8067897000001 511.97883850000005 683.6347409 ZT12-15 935.0132226000001 909.80468725 960.22175795 ZT16-19 1079.8531477000001 916.7459219 1242.9603735 ZT20-23 627.17376025 546.4448176 707.9027029000001