condition mean min max ZT0-3 0.054272825 0.0 0.10854565 ZT4-7 0.0 0.0 0.0 ZT8-11 0.10936375000000001 0.10936375000000001 0.10936375000000001 ZT12-15 0 0 0 ZT16-19 0.2871715 0.2871715 0.2871715 ZT20-23 0.107831 0.107831 0.107831