condition mean min max ZT0-3 0.011558525 0.0 0.02311705 ZT4-7 0.0 0.0 0.0 ZT8-11 0.046823 0.046823 0.046823 ZT12-15 0 0 0 ZT16-19 0.0233325 0.0233325 0.0233325 ZT20-23 0.0235021 0.0235021 0.0235021