condition mean min max ZT0-3 26.5055 26.5055 26.5055 ZT4-7 22.017200000000003 22.017200000000003 22.017200000000003 ZT8-11 23.32325 23.32325 23.32325 ZT12-15 24.69475 24.69475 24.69475 ZT16-19 32.8517 32.8517 32.8517 ZT20-23 31.7524 31.7524 31.7524