condition mean min max ZT0-3 187.9 187.9 187.9 ZT4-7 331.5 331.5 331.5 ZT8-11 364.1 364.1 364.1 ZT12-15 319.65 319.65 319.65 ZT16-19 500.9 500.9 500.9 ZT20-23 394.5 394.5 394.5