condition mean min max ZT0-3 371.965967 371.965967 371.965967 ZT4-7 454.8305495 454.8305495 454.8305495 ZT8-11 440.116672 440.116672 440.116672 ZT12-15 473.2650505 473.2650505 473.2650505 ZT16-19 374.13487 374.13487 374.13487 ZT20-23 347.36790199999996 347.36790199999996 347.36790199999996