condition mean min max ZT0-3 878.5 878.5 878.5 ZT4-7 619.2 619.2 619.2 ZT8-11 577.2 577.2 577.2 ZT12-15 547.2 547.2 547.2 ZT16-19 1304.4 1304.4 1304.4 ZT20-23 1664.25 1664.25 1664.25