condition mean min max ZT0-3 349.25 349.25 349.25 ZT4-7 263.7 263.7 263.7 ZT8-11 186.65 186.65 186.65 ZT12-15 255.5 255.5 255.5 ZT16-19 199.1 199.1 199.1 ZT20-23 297.1 297.1 297.1