condition mean min max ZT0-3 109.991398 109.991398 109.991398 ZT4-7 136.8121295 136.8121295 136.8121295 ZT8-11 140.53360049999998 140.53360049999998 140.53360049999998 ZT12-15 124.02144 124.02144 124.02144 ZT16-19 148.147932 148.147932 148.147932 ZT20-23 134.8631825 134.8631825 134.8631825