condition mean min max ZT0-3 68.454854125 60.07211117 76.83759708 ZT4-7 37.1417711275 30.534155215000002 43.74938704 ZT8-11 76.53220497 59.74458481 93.31982513 ZT12-15 61.02400339 52.21567347 69.83233331 ZT16-19 82.27226291 65.794769315 98.749756505 ZT20-23 146.04092057499997 132.12316155 159.95867959999998