condition mean min max ZT0-3 1.4754255 0.488758 2.4620930000000003 ZT4-7 6.660745 6.660745 6.660745 ZT8-11 1.853885 1.853885 1.853885 ZT12-15 0 0 0 ZT16-19 1.958388 1.958388 1.958388 ZT20-23 5.07444 5.07444 5.07444