condition mean min max ZT0-3 17.58125 16.7738 18.3887 ZT4-7 12.3339 12.3339 12.3339 ZT8-11 14.14315 14.14315 14.14315 ZT12-15 0 0 0 ZT16-19 18.4493 18.4493 18.4493 ZT20-23 19.038849999999996 19.038849999999996 19.038849999999996