condition mean min max ZT0-3 2035.34951075 1951.393896 2119.3051255 ZT4-7 1454.2811892 1157.2995374 1751.2628410000002 ZT8-11 574.1608491 485.85060115 662.47109705 ZT12-15 628.9551206 471.2476177 786.6626235 ZT16-19 940.0367522249999 914.4550273499999 965.6184771 ZT20-23 784.3276207250001 730.300914 838.35432745