condition mean min max ZT0-3 3.35 3.35 3.35 ZT4-7 3.5 3.5 3.5 ZT8-11 14.399999999999999 14.399999999999999 14.399999999999999 ZT12-15 7.6499999999999995 7.6499999999999995 7.6499999999999995 ZT16-19 3.45 3.45 3.45 ZT20-23 3.6 3.6 3.6