condition mean min max ZT0-3 42.281778 42.281778 42.281778 ZT4-7 36.372896499999996 36.372896499999996 36.372896499999996 ZT8-11 40.784379 40.784379 40.784379 ZT12-15 41.3238975 41.3238975 41.3238975 ZT16-19 36.5072135 36.5072135 36.5072135 ZT20-23 37.7228035 37.7228035 37.7228035