condition mean min max ZT0-3 73.7121 73.7121 73.7121 ZT4-7 57.73095 57.73095 57.73095 ZT8-11 30.44265 30.44265 30.44265 ZT12-15 34.6444 34.6444 34.6444 ZT16-19 49.0914 49.0914 49.0914 ZT20-23 64.65205 64.65205 64.65205