condition mean min max ZT0-3 809.2506666666667 556.775 1104.4955 ZT4-7 392.0555 392.0555 392.0555 ZT8-11 364.0985 364.0985 364.0985 ZT12-15 512.408 496.243 528.5730000000001 ZT16-19 607.7725 607.7725 607.7725 ZT20-23 946.9365 946.9365 946.9365