condition mean min max ZT0-3 13.734100000000002 12.6288 14.490950000000002 ZT4-7 16.16685 16.16685 16.16685 ZT8-11 24.120199999999997 24.120199999999997 24.120199999999997 ZT12-15 14.854049999999999 11.951049999999999 17.75705 ZT16-19 12.778 12.778 12.778 ZT20-23 8.289975 8.289975 8.289975