condition mean min max ZT0-3 33.021550000000005 29.84205 36.20105 ZT4-7 30.3983 30.3983 30.3983 ZT8-11 29.8398 29.8398 29.8398 ZT12-15 0 0 0 ZT16-19 72.9974 72.9974 72.9974 ZT20-23 57.371449999999996 57.371449999999996 57.371449999999996