condition mean min max ZT0-3 0.807275 0.783189 0.831361 ZT4-7 0.4195335 0.4195335 0.4195335 ZT8-11 1.0791595 1.0791595 1.0791595 ZT12-15 0 0 0 ZT16-19 1.303565 1.303565 1.303565 ZT20-23 0.714118 0.714118 0.714118