condition mean min max ZT0-3 32.686949999999996 31.942 33.4319 ZT4-7 47.5704 47.5704 47.5704 ZT8-11 30.3427 30.3427 30.3427 ZT12-15 0 0 0 ZT16-19 26.29815 26.29815 26.29815 ZT20-23 43.56614999999999 43.56614999999999 43.56614999999999