condition mean min max ZT0-3 3264.0 3264.0 3264.0 ZT4-7 2544.0 2544.0 2544.0 ZT8-11 2322.05 2322.05 2322.05 ZT12-15 2033.6499999999999 2033.6499999999999 2033.6499999999999 ZT16-19 2458.85 2458.85 2458.85 ZT20-23 3204.5 3204.5 3204.5