condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.40616402975 0.098886054 0.7134420055 ZT8-11 2.66782675575 1.9338317775 3.4018217340000003 ZT12-15 3.07163995075 3.0193326985 3.123947203 ZT16-19 1.0803041745000002 1.0641459675 1.0964623815 ZT20-23 0.8963688385 0.8746071865 0.9181304905000001