condition mean min max ZT0-3 191.89355194 62.12399568 321.6631082 ZT4-7 223.393291565 115.44102883 331.3455543 ZT8-11 132.15089988 92.66395666 171.6378431 ZT12-15 158.668918325 150.37003975 166.9677969 ZT16-19 152.864500475 144.1742068 161.55479415000002 ZT20-23 157.16420073 139.58873736 174.73966410000003