condition mean min max ZT0-3 48.24329629499999 45.565979309999996 50.92061328 ZT4-7 45.0159888 43.360762030000004 46.67121557 ZT8-11 48.98061489333334 48.60828320666667 49.35294658 ZT12-15 51.35629857 49.60681864 53.1057785 ZT16-19 50.96279829666667 49.82378269666667 52.10181389666667 ZT20-23 49.77100199333333 49.260078566666664 50.28192542