condition mean min max ZT0-3 46.09458333333333 39.3775 56.947050000000004 ZT4-7 37.8351 37.8351 37.8351 ZT8-11 46.88195 46.88195 46.88195 ZT12-15 106.6645 101.561 111.768 ZT16-19 90.2607 90.2607 90.2607 ZT20-23 90.5222 90.5222 90.5222