condition mean min max ZT0-3 93.00255 35.304 196.05599999999998 ZT4-7 177.4585 177.4585 177.4585 ZT8-11 167.058 167.058 167.058 ZT12-15 63.87415 55.83255 71.91575 ZT16-19 44.3772 44.3772 44.3772 ZT20-23 33.2375 33.2375 33.2375