condition mean min max ZT0-3 700.159454075 563.49488515 836.824023 ZT4-7 190.1124586 175.5066031 204.7183141 ZT8-11 231.25820012500003 188.6450172 273.87138305 ZT12-15 121.68924762749998 73.93732184999999 169.44117340499997 ZT16-19 114.11237655 106.59721144999999 121.62754165000001 ZT20-23 129.0010211 117.77005439999999 140.2319878