condition mean min max ZT0-3 41.6057 33.339349999999996 46.2191 ZT4-7 32.2716 32.2716 32.2716 ZT8-11 33.9895 33.9895 33.9895 ZT12-15 42.5386 42.2907 42.786500000000004 ZT16-19 38.8571 38.8571 38.8571 ZT20-23 51.5249 51.5249 51.5249