condition mean min max ZT0-3 24.916403945 19.825764909999997 30.00704298 ZT4-7 43.4620987575 36.195401915000005 50.7287956 ZT8-11 66.0004733525 58.21484243 73.786104275 ZT12-15 102.98363430250001 101.035282165 104.93198644 ZT16-19 111.95799217249998 109.447160445 114.46882389999999 ZT20-23 93.0013130225 92.687249075 93.31537697