condition mean min max ZT0-3 3.89604 3.58292 4.20916 ZT4-7 2.399775 2.399775 2.399775 ZT8-11 5.94757 5.94757 5.94757 ZT12-15 0 0 0 ZT16-19 5.66732 5.66732 5.66732 ZT20-23 4.499454999999999 4.499454999999999 4.499454999999999