condition mean min max ZT0-3 218.41675 212.8145 224.019 ZT4-7 479.9215 479.9215 479.9215 ZT8-11 773.428 773.428 773.428 ZT12-15 0 0 0 ZT16-19 734.9895 734.9895 734.9895 ZT20-23 512.6925 512.6925 512.6925