condition mean min max ZT0-3 28.1260588325 21.418390795 34.83372687 ZT4-7 13.190695725000001 11.732641995 14.648749455 ZT8-11 17.031720605 15.914647004999999 18.148794205 ZT12-15 20.498965185000003 16.508166155 24.489764215 ZT16-19 30.892125725 24.745345845000003 37.038905605 ZT20-23 68.97943814749999 56.57875383 81.380122465