condition mean min max ZT0-3 83.001656 83.001656 83.001656 ZT4-7 113.0702445 113.0702445 113.0702445 ZT8-11 166.84096 166.84096 166.84096 ZT12-15 211.03279049999998 211.03279049999998 211.03279049999998 ZT16-19 144.1570165 144.1570165 144.1570165 ZT20-23 132.8376915 132.8376915 132.8376915