condition mean min max ZT0-3 201.728608 201.728608 201.728608 ZT4-7 192.16742599999998 192.16742599999998 192.16742599999998 ZT8-11 271.649307 271.649307 271.649307 ZT12-15 295.59342200000003 295.59342200000003 295.59342200000003 ZT16-19 229.6179795 229.6179795 229.6179795 ZT20-23 168.39689049999998 168.39689049999998 168.39689049999998