condition mean min max ZT0-3 15.8169 15.8169 15.8169 ZT4-7 11.143284999999999 11.143284999999999 11.143284999999999 ZT8-11 11.851849999999999 11.851849999999999 11.851849999999999 ZT12-15 13.093399999999999 13.093399999999999 13.093399999999999 ZT16-19 13.2289 13.2289 13.2289 ZT20-23 14.174050000000001 14.174050000000001 14.174050000000001