condition mean min max ZT0-3 391.72674175 234.95718540000001 548.4962981 ZT4-7 776.7384941500001 690.9714303000001 862.5055580000001 ZT8-11 271.1454953275 152.50895875499998 389.7820319 ZT12-15 119.76890102000002 71.02420459000001 168.51359745000002 ZT16-19 182.80223565 175.3698657 190.2346056 ZT20-23 122.1539842975 98.625978895 145.6819897