condition mean min max ZT0-3 1.4168925 1.2551 1.5786850000000001 ZT4-7 0.647363 0.647363 0.647363 ZT8-11 0.648535 0.648535 0.648535 ZT12-15 0 0 0 ZT16-19 1.631245 1.631245 1.631245 ZT20-23 1.500205 1.500205 1.500205