condition mean min max ZT0-3 53.010149999999996 53.010149999999996 53.010149999999996 ZT4-7 38.001999999999995 38.001999999999995 38.001999999999995 ZT8-11 33.71235 33.71235 33.71235 ZT12-15 39.66485 39.66485 39.66485 ZT16-19 50.6533 50.6533 50.6533 ZT20-23 54.2141 54.2141 54.2141