condition mean min max ZT0-3 0.37206633333333333 0.1582585 0.56604 ZT4-7 0.218129 0.218129 0.218129 ZT8-11 0.269343 0.269343 0.269343 ZT12-15 0.260142 0.2339565 0.2863275 ZT16-19 0.36053749999999996 0.36053749999999996 0.36053749999999996 ZT20-23 0.41112550000000003 0.41112550000000003 0.41112550000000003