condition mean min max ZT0-3 225.14999999999998 225.14999999999998 225.14999999999998 ZT4-7 160.3 160.3 160.3 ZT8-11 143.8 143.8 143.8 ZT12-15 173.60000000000002 173.60000000000002 173.60000000000002 ZT16-19 208.45 208.45 208.45 ZT20-23 260.65 260.65 260.65