condition mean min max ZT0-3 72.63828333333333 49.94135 106.9995 ZT4-7 63.91385 63.91385 63.91385 ZT8-11 45.77715 45.77715 45.77715 ZT12-15 46.44665 38.65275 54.24055 ZT16-19 38.1734 38.1734 38.1734 ZT20-23 59.15665 59.15665 59.15665