condition mean min max ZT0-3 13.564699999999998 12.71035 14.419049999999999 ZT4-7 10.287955 10.287955 10.287955 ZT8-11 10.33638 10.33638 10.33638 ZT12-15 0 0 0 ZT16-19 12.69575 12.69575 12.69575 ZT20-23 12.5427 12.5427 12.5427