condition mean min max ZT0-3 53.0504783175 44.29967443 61.801282205 ZT4-7 41.8920182225 41.395214935 42.38882151 ZT8-11 46.3548993325 39.680613754999996 53.02918491 ZT12-15 38.7242062925 33.721875605 43.72653698 ZT16-19 35.829596699999996 35.245209515 36.413983885 ZT20-23 43.9119366475 41.04967524 46.774198055