condition mean min max ZT0-3 120.69483333333334 92.2065 150.54649999999998 ZT4-7 81.87610000000001 81.87610000000001 81.87610000000001 ZT8-11 52.585899999999995 52.585899999999995 52.585899999999995 ZT12-15 80.709525 78.56625 82.8528 ZT16-19 82.40639999999999 82.40639999999999 82.40639999999999 ZT20-23 95.61205000000001 95.61205000000001 95.61205000000001