condition mean min max ZT0-3 0.7967204999999999 0.697898 0.895543 ZT4-7 0.5167435 0.5167435 0.5167435 ZT8-11 0.25839999999999996 0.25839999999999996 0.25839999999999996 ZT12-15 0 0 0 ZT16-19 0.31458450000000004 0.31458450000000004 0.31458450000000004 ZT20-23 0.8859885 0.8859885 0.8859885