condition mean min max ZT0-3 0.3459215 0.3459215 0.3459215 ZT4-7 0.2620515 0.2620515 0.2620515 ZT8-11 0.1439825 0.1439825 0.1439825 ZT12-15 0.2293555 0.2293555 0.2293555 ZT16-19 0.3403525 0.3403525 0.3403525 ZT20-23 0.3401445 0.3401445 0.3401445