condition mean min max ZT0-3 26.951324999999997 26.22505 27.677599999999998 ZT4-7 16.56985 16.56985 16.56985 ZT8-11 18.457700000000003 18.457700000000003 18.457700000000003 ZT12-15 0 0 0 ZT16-19 26.2576 26.2576 26.2576 ZT20-23 25.3169 25.3169 25.3169