condition mean min max ZT0-3 424.55 424.55 424.55 ZT4-7 434.9 434.9 434.9 ZT8-11 532.0 532.0 532.0 ZT12-15 826.75 826.75 826.75 ZT16-19 894.9000000000001 894.9000000000001 894.9000000000001 ZT20-23 625.3499999999999 625.3499999999999 625.3499999999999