condition mean min max ZT0-3 21.20205 21.035449999999997 21.36865 ZT4-7 16.7106 16.7106 16.7106 ZT8-11 13.1302 13.1302 13.1302 ZT12-15 0 0 0 ZT16-19 14.2692 14.2692 14.2692 ZT20-23 16.454900000000002 16.454900000000002 16.454900000000002