condition mean min max ZT0-3 32.45 32.45 32.45 ZT4-7 44.5 44.5 44.5 ZT8-11 10.1 10.1 10.1 ZT12-15 29.700000000000003 29.700000000000003 29.700000000000003 ZT16-19 31.15 31.15 31.15 ZT20-23 19.5 19.5 19.5