condition mean min max ZT0-3 0.0836562 0.0836562 0.0836562 ZT4-7 0.0 0.0 0.0 ZT8-11 0.03268745 0.03268745 0.03268745 ZT12-15 0.3458285 0.3458285 0.3458285 ZT16-19 0.11976124999999999 0.11976124999999999 0.11976124999999999 ZT20-23 0.0890409 0.0890409 0.0890409