condition mean min max ZT0-3 86.27000000000001 72.74325 95.22065 ZT4-7 72.20215 72.20215 72.20215 ZT8-11 51.4917 51.4917 51.4917 ZT12-15 48.91952499999999 40.7536 57.085449999999994 ZT16-19 70.3428 70.3428 70.3428 ZT20-23 81.68095 81.68095 81.68095