condition mean min max ZT0-3 1.6274775 0.98499 2.269965 ZT4-7 2.004835 2.004835 2.004835 ZT8-11 4.261135 4.261135 4.261135 ZT12-15 0 0 0 ZT16-19 1.986377 1.986377 1.986377 ZT20-23 0.500695 0.500695 0.500695