condition mean min max ZT0-3 281.55 281.55 281.55 ZT4-7 467.9 467.9 467.9 ZT8-11 321.65 321.65 321.65 ZT12-15 352.65 352.65 352.65 ZT16-19 408.6 408.6 408.6 ZT20-23 385.3 385.3 385.3