condition mean min max ZT0-3 19.395500000000002 18.450850000000003 20.34015 ZT4-7 23.86305 23.86305 23.86305 ZT8-11 19.2851 19.2851 19.2851 ZT12-15 0 0 0 ZT16-19 25.26645 25.26645 25.26645 ZT20-23 19.257350000000002 19.257350000000002 19.257350000000002