condition mean min max ZT0-3 35.4689 35.4689 35.4689 ZT4-7 40.697900000000004 40.697900000000004 40.697900000000004 ZT8-11 55.221199999999996 55.221199999999996 55.221199999999996 ZT12-15 33.7598 33.7598 33.7598 ZT16-19 34.1057 34.1057 34.1057 ZT20-23 36.785000000000004 36.785000000000004 36.785000000000004