condition mean min max ZT0-3 0.04933401666666667 0.0 0.0750265 ZT4-7 0.0701563 0.0701563 0.0701563 ZT8-11 0.07244919999999999 0.07244919999999999 0.07244919999999999 ZT12-15 0.01764805 0.0 0.0352961 ZT16-19 0.0 0.0 0.0 ZT20-23 0.03952785 0.03952785 0.03952785