condition mean min max ZT0-3 37.3401 35.16415 39.51605 ZT4-7 2.86592 2.86592 2.86592 ZT8-11 3.34481 3.34481 3.34481 ZT12-15 0 0 0 ZT16-19 91.06595 91.06595 91.06595 ZT20-23 349.7165 349.7165 349.7165