condition mean min max ZT0-3 5.8418525 4.59444 7.089265000000001 ZT4-7 0.805625 0.805625 0.805625 ZT8-11 0.7507714999999999 0.7507714999999999 0.7507714999999999 ZT12-15 0 0 0 ZT16-19 2.8798700000000004 2.8798700000000004 2.8798700000000004 ZT20-23 0.8735080000000001 0.8735080000000001 0.8735080000000001