condition mean min max ZT0-3 115.873224 115.873224 115.873224 ZT4-7 95.67058 95.67058 95.67058 ZT8-11 86.24086249999999 86.24086249999999 86.24086249999999 ZT12-15 73.7890125 73.7890125 73.7890125 ZT16-19 144.8539535 144.8539535 144.8539535 ZT20-23 125.23485050000001 125.23485050000001 125.23485050000001