condition mean min max ZT0-3 0.70043275 0.666593 0.7342725 ZT4-7 1.189135 1.189135 1.189135 ZT8-11 0.8489340000000001 0.8489340000000001 0.8489340000000001 ZT12-15 0 0 0 ZT16-19 0.666534 0.666534 0.666534 ZT20-23 0.782009 0.782009 0.782009