condition mean min max ZT0-3 58.23522152925 4.137456491 112.3329865675 ZT4-7 231.9317631 225.03868764999999 238.82483855 ZT8-11 147.90168756 110.24594216999999 185.55743295 ZT12-15 10.23257524775 3.0489400565 17.416210439 ZT16-19 6.2986810625 5.4060406235 7.1913215015 ZT20-23 6.8417528485000005 4.8425949275 8.8409107695