condition mean min max ZT0-3 0.7871453333333334 0.6481375 0.880881 ZT4-7 0.2308075 0.2308075 0.2308075 ZT8-11 0.395038 0.395038 0.395038 ZT12-15 0.38317824999999994 0.1646435 0.6017129999999999 ZT16-19 0.076427 0.076427 0.076427 ZT20-23 0.6802205 0.6802205 0.6802205