condition mean min max ZT0-3 2.79767768425 1.379604939 4.2157504295 ZT4-7 10.70528435175 7.9077396785000005 13.502829025 ZT8-11 14.370840135 13.095495515 15.646184755 ZT12-15 20.8211920225 20.293643375000002 21.348740669999998 ZT16-19 22.620945730000003 19.845199295 25.396692165 ZT20-23 44.5911605675 37.483104104999995 51.69921703