condition mean min max ZT0-3 10.0 10.0 10.0 ZT4-7 2.8 2.8 2.8 ZT8-11 2.6500000000000004 2.6500000000000004 2.6500000000000004 ZT12-15 3.3 3.3 3.3 ZT16-19 6.95 6.95 6.95 ZT20-23 11.399999999999999 11.399999999999999 11.399999999999999