condition mean min max ZT0-3 78.35736666666666 78.35736666666666 78.35736666666666 ZT4-7 72.73775 72.73775 72.73775 ZT8-11 227.787 227.787 227.787 ZT12-15 214.88649999999998 214.88649999999998 214.88649999999998 ZT16-19 192.6455 192.6455 192.6455 ZT20-23 98.2975 98.2975 98.2975