condition mean min max ZT0-3 603.9499999999999 603.9499999999999 603.9499999999999 ZT4-7 2047.5 2047.5 2047.5 ZT8-11 1412.0500000000002 1412.0500000000002 1412.0500000000002 ZT12-15 269.75 269.75 269.75 ZT16-19 47.0 47.0 47.0 ZT20-23 46.2 46.2 46.2