condition mean min max ZT0-3 35.30145 29.651600000000002 40.9513 ZT4-7 22.30825 22.30825 22.30825 ZT8-11 5.309419999999999 5.309419999999999 5.309419999999999 ZT12-15 0 0 0 ZT16-19 13.86009 13.86009 13.86009 ZT20-23 29.15645 29.15645 29.15645