condition mean min max ZT0-3 0.792335 0.670208 0.9144620000000001 ZT4-7 0.9802150000000001 0.9802150000000001 0.9802150000000001 ZT8-11 3.1819499999999996 3.1819499999999996 3.1819499999999996 ZT12-15 0 0 0 ZT16-19 2.391075 2.391075 2.391075 ZT20-23 1.446545 1.446545 1.446545