condition mean min max ZT0-3 3.51775383625 3.2209074385 3.814600234 ZT4-7 1.0370149469999999 0.824620446 1.249409448 ZT8-11 1.74230114075 0.9810378565 2.503564425 ZT12-15 3.74105449425 3.3397188665 4.142390122 ZT16-19 5.30844090925 4.957406917 5.659474901499999 ZT20-23 10.44295829875 7.2617423924999995 13.624174205