condition mean min max ZT0-3 152.56925 152.56925 152.56925 ZT4-7 245.0800855 245.0800855 245.0800855 ZT8-11 236.1401775 236.1401775 236.1401775 ZT12-15 158.9398845 158.9398845 158.9398845 ZT16-19 87.25924749999999 87.25924749999999 87.25924749999999 ZT20-23 70.969705 70.969705 70.969705