condition mean min max ZT0-3 1.703465 1.59925 1.80768 ZT4-7 0.425288 0.425288 0.425288 ZT8-11 0.25650850000000003 0.25650850000000003 0.25650850000000003 ZT12-15 0 0 0 ZT16-19 0.8989705 0.8989705 0.8989705 ZT20-23 1.00958 1.00958 1.00958