condition mean min max ZT0-3 20.385733865 15.703190099999999 25.068277629999997 ZT4-7 47.20650069 32.590337415 61.822663965000004 ZT8-11 116.47627021499999 85.487990865 147.46454956499997 ZT12-15 371.64989529999997 363.35145839999996 379.9483322 ZT16-19 262.547011925 210.14176669999998 314.95225715000004 ZT20-23 125.8415496825 107.55749901499999 144.12560035