condition mean min max ZT0-3 149.00113333333334 115.8414 191.64600000000002 ZT4-7 109.4987 109.4987 109.4987 ZT8-11 108.1695 108.1695 108.1695 ZT12-15 399.46275 360.416 438.5095 ZT16-19 292.587 292.587 292.587 ZT20-23 301.19399999999996 301.19399999999996 301.19399999999996