condition mean min max ZT0-3 0.660976 0.660976 0.660976 ZT4-7 0.4241835 0.4241835 0.4241835 ZT8-11 0.9599645 0.9599645 0.9599645 ZT12-15 0.700372 0.700372 0.700372 ZT16-19 0.9552415 0.9552415 0.9552415 ZT20-23 0.36766750000000004 0.36766750000000004 0.36766750000000004