condition mean min max ZT0-3 0.0215947 0.0215947 0.0215947 ZT4-7 0.01502745 0.01502745 0.01502745 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0297396 0.0297396 0.0297396 ZT16-19 0.0131848 0.0131848 0.0131848 ZT20-23 0.20167705000000002 0.20167705000000002 0.20167705000000002