condition mean min max ZT0-3 0.03383 0.03383 0.03383 ZT4-7 0.012485000000000001 0.012485000000000001 0.012485000000000001 ZT8-11 0.03483725 0.03483725 0.03483725 ZT12-15 0.01757225 0.01757225 0.01757225 ZT16-19 0.0 0.0 0.0 ZT20-23 0.02464791666666667 0.02464791666666667 0.02464791666666667