condition mean min max ZT0-3 42.808944 42.808944 42.808944 ZT4-7 44.060355 44.060355 44.060355 ZT8-11 45.663295500000004 45.663295500000004 45.663295500000004 ZT12-15 40.7293035 40.7293035 40.7293035 ZT16-19 55.560896 55.560896 55.560896 ZT20-23 48.9175115 48.9175115 48.9175115