condition mean min max ZT0-3 471.6195 435.563 490.223 ZT4-7 334.19050000000004 334.19050000000004 334.19050000000004 ZT8-11 225.7425 225.7425 225.7425 ZT12-15 372.15175000000005 345.38750000000005 398.91600000000005 ZT16-19 435.14549999999997 435.14549999999997 435.14549999999997 ZT20-23 486.919 486.919 486.919