condition mean min max ZT0-3 1.38711 1.38711 1.38711 ZT4-7 0.4370765 0.4370765 0.4370765 ZT8-11 0.389742 0.389742 0.389742 ZT12-15 0.454169 0.454169 0.454169 ZT16-19 2.77349 2.77349 2.77349 ZT20-23 1.1899199999999999 1.1899199999999999 1.1899199999999999