condition mean min max ZT0-3 0.37755075 0.317338 0.43776349999999997 ZT4-7 0.5043415 0.5043415 0.5043415 ZT8-11 0.6032394999999999 0.6032394999999999 0.6032394999999999 ZT12-15 0 0 0 ZT16-19 0.654531 0.654531 0.654531 ZT20-23 0.6575880000000001 0.6575880000000001 0.6575880000000001