condition mean min max ZT0-3 49.281324999999995 45.917249999999996 52.645399999999995 ZT4-7 41.28895 41.28895 41.28895 ZT8-11 46.82285 46.82285 46.82285 ZT12-15 0 0 0 ZT16-19 56.4426 56.4426 56.4426 ZT20-23 51.5811 51.5811 51.5811