condition mean min max ZT0-3 36.8404 36.8404 36.8404 ZT4-7 41.5681 41.5681 41.5681 ZT8-11 25.286250000000003 25.286250000000003 25.286250000000003 ZT12-15 24.6447 24.6447 24.6447 ZT16-19 28.386400000000002 28.386400000000002 28.386400000000002 ZT20-23 37.08955 37.08955 37.08955