condition mean min max ZT0-3 0.9208685 0.9208685 0.9208685 ZT4-7 0.5666905 0.5666905 0.5666905 ZT8-11 0.616959 0.616959 0.616959 ZT12-15 0.5785800000000001 0.5785800000000001 0.5785800000000001 ZT16-19 0.775372 0.775372 0.775372 ZT20-23 0.8013835 0.8013835 0.8013835