condition mean min max ZT0-3 14.31111111 14.31111111 14.31111111 ZT4-7 45.711111111 45.711111111 45.711111111 ZT8-11 58.035 58.035 58.035 ZT12-15 49.15 49.15 49.15 ZT16-19 20.10888889 20.10888889 20.10888889 ZT20-23 20.595555553333334 20.595555553333334 20.595555553333334