condition mean min max ZT0-3 0.18286514225 0.022077273999999997 0.3436530105 ZT4-7 0.86531222675 0.630760393 1.0998640605 ZT8-11 1.49671230675 1.301640775 1.6917838385000001 ZT12-15 3.57465148125 2.7409348075 4.408368155 ZT16-19 4.9363049065 4.288515187 5.584094626 ZT20-23 6.644137645500001 6.241159633500001 7.0471156575