condition mean min max ZT0-3 228.05 228.05 228.05 ZT4-7 232.2 232.2 232.2 ZT8-11 218.2 218.2 218.2 ZT12-15 244.75 244.75 244.75 ZT16-19 263.05 263.05 263.05 ZT20-23 297.15 297.15 297.15