condition mean min max ZT0-3 0.55612760425 0.114378787 0.9978764215 ZT4-7 4.0211007035 3.559458503 4.482742904 ZT8-11 4.969863982 4.9509366935 4.9887912705 ZT12-15 3.98413187 3.9017001305 4.0665636095 ZT16-19 5.6510180304999995 4.606305112499999 6.6957309485 ZT20-23 13.54886177675 9.4628909085 17.634832645