condition mean min max ZT0-3 17.972627087 12.068682343999999 23.87657183 ZT4-7 17.16440447 12.16877658 22.160032360000002 ZT8-11 44.16588295 31.171854625 57.159911275 ZT12-15 67.79197813500001 50.627060795000006 84.95689547500001 ZT16-19 161.688102825 128.60552404999999 194.7706816 ZT20-23 199.03640287500002 189.20644365 208.8663621