condition mean min max ZT0-3 42.782759 42.782759 42.782759 ZT4-7 46.789017 46.789017 46.789017 ZT8-11 39.170334 39.170334 39.170334 ZT12-15 80.0720335 80.0720335 80.0720335 ZT16-19 36.260222999999996 36.260222999999996 36.260222999999996 ZT20-23 96.456638 96.456638 96.456638