condition mean min max ZT0-3 0.28456136899999995 0.18937606899999998 0.379746669 ZT4-7 0.20983249299999998 0.136736011 0.28292897499999997 ZT8-11 1.0740457515 0.769685645 1.3784058579999998 ZT12-15 0.83633513775 0.261502093 1.4111681825 ZT16-19 0.38044685199999995 0.27293941699999996 0.487954287 ZT20-23 0.342533784 0.3138764525 0.37119111550000006