condition mean min max ZT0-3 0.9615438333333334 0.588542 1.14944 ZT4-7 0.599422 0.599422 0.599422 ZT8-11 0.495765 0.495765 0.495765 ZT12-15 0.7827220000000001 0.546304 1.0191400000000002 ZT16-19 0.769809 0.769809 0.769809 ZT20-23 0.9605130000000001 0.9605130000000001 0.9605130000000001