condition mean min max ZT0-3 4.19110858225 1.57861632 6.8036008445 ZT4-7 21.108794385 20.648061735 21.569527035 ZT8-11 30.527962925 23.233621579999998 37.822304270000004 ZT12-15 163.313647915 162.54070383 164.086592 ZT16-19 137.3296274525 111.44644325499999 163.21281165 ZT20-23 69.92497157 54.435302315 85.41464082499999