condition mean min max ZT0-3 50.03011912000001 34.56008295 65.50015529000001 ZT4-7 53.96073169499999 50.49176205 57.429701339999994 ZT8-11 30.1343656525 26.830986295 33.43774501 ZT12-15 17.097629502 15.998869565 18.196389439 ZT16-19 23.287460680000002 21.01590781 25.55901355 ZT20-23 28.921176905 28.418834075 29.423519735