condition mean min max ZT0-3 0.061713479 0.061221979 0.062204979 ZT4-7 0.0067865435 0.0 0.013573087 ZT8-11 0.00431221925 0.0 0.0086244385 ZT12-15 0.0132769695 0.011817261999999999 0.014736677 ZT16-19 0.042110672 0.034307505 0.049913839 ZT20-23 0.02640379575 0.0 0.0528075915