condition mean min max ZT0-3 0.8048187499999999 0.7543 0.8553375 ZT4-7 0.8739295 0.8739295 0.8739295 ZT8-11 0.754738 0.754738 0.754738 ZT12-15 0 0 0 ZT16-19 1.3773300000000002 1.3773300000000002 1.3773300000000002 ZT20-23 1.807685 1.807685 1.807685