condition mean min max ZT0-3 658.5167203999999 584.4886704 732.5447704 ZT4-7 215.89135059999998 168.05087164999998 263.73182955 ZT8-11 91.6887135675 91.364596805 92.01283033 ZT12-15 57.9964706925 45.67488313 70.318058255 ZT16-19 86.8785467575 74.64465163 99.112441885 ZT20-23 113.494407905 105.96705681 121.021759