condition mean min max ZT0-3 17.0155 16.21515 17.815849999999998 ZT4-7 17.529249999999998 17.529249999999998 17.529249999999998 ZT8-11 14.606850000000001 14.606850000000001 14.606850000000001 ZT12-15 0 0 0 ZT16-19 16.69075 16.69075 16.69075 ZT20-23 15.58155 15.58155 15.58155