condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.035925919 0.029121481 0.042730357000000004 ZT12-15 0.1708920335 0.16877125050000003 0.1730128165 ZT16-19 0.57511262875 0.2714370975 0.87878816 ZT20-23 1.64560240075 1.1513181425 2.139886659