condition mean min max ZT0-3 109.616673 109.616673 109.616673 ZT4-7 63.9880755 63.9880755 63.9880755 ZT8-11 52.7614885 52.7614885 52.7614885 ZT12-15 61.8267515 61.8267515 61.8267515 ZT16-19 43.2363725 43.2363725 43.2363725 ZT20-23 32.262893000000005 32.262893000000005 32.262893000000005