condition mean min max ZT0-3 369.5 369.5 369.5 ZT4-7 268.4 268.4 268.4 ZT8-11 255.4 255.4 255.4 ZT12-15 291.05 291.05 291.05 ZT16-19 357.35 357.35 357.35 ZT20-23 335.75 335.75 335.75