condition mean min max ZT0-3 0.6410589999999999 0.527347 0.834015 ZT4-7 0.0 0.0 0.0 ZT8-11 0.34322 0.34322 0.34322 ZT12-15 0.35423775 0.3350595 0.373416 ZT16-19 0.1663835 0.1663835 0.1663835 ZT20-23 0.361857 0.361857 0.361857