condition mean min max ZT0-3 494.6 494.6 494.6 ZT4-7 581.7 581.7 581.7 ZT8-11 506.6 506.6 506.6 ZT12-15 479.05 479.05 479.05 ZT16-19 489.35 489.35 489.35 ZT20-23 565.9 565.9 565.9