condition mean min max ZT0-3 24.78695 24.78695 24.78695 ZT4-7 31.6118 31.6118 31.6118 ZT8-11 15.70685 15.70685 15.70685 ZT12-15 5.859 5.859 5.859 ZT16-19 9.75717 9.75717 9.75717 ZT20-23 9.399004999999999 9.399004999999999 9.399004999999999