condition mean min max ZT0-3 73.595503 73.595503 73.595503 ZT4-7 38.139979 38.139979 38.139979 ZT8-11 14.557742000000001 14.557742000000001 14.557742000000001 ZT12-15 52.3247595 52.3247595 52.3247595 ZT16-19 31.954865499999997 31.954865499999997 31.954865499999997 ZT20-23 27.940721500000002 27.940721500000002 27.940721500000002