condition mean min max ZT0-3 176.25958 176.25958 176.25958 ZT4-7 152.1068045 152.1068045 152.1068045 ZT8-11 143.433739 143.433739 143.433739 ZT12-15 206.111817 206.111817 206.111817 ZT16-19 173.53274299999998 173.53274299999998 173.53274299999998 ZT20-23 162.8638775 162.8638775 162.8638775