condition mean min max ZT0-3 36.66891666666667 35.2823 39.294650000000004 ZT4-7 26.80075 26.80075 26.80075 ZT8-11 28.26855 28.26855 28.26855 ZT12-15 28.8468 28.10535 29.588250000000002 ZT16-19 28.3983 28.3983 28.3983 ZT20-23 36.85985 36.85985 36.85985