condition mean min max ZT0-3 1.0873331666666666 1.0873331666666666 1.0873331666666666 ZT4-7 0.9907027500000001 0.9907027500000001 0.9907027500000001 ZT8-11 1.17996275 1.17996275 1.17996275 ZT12-15 1.28874 1.28874 1.28874 ZT16-19 1.309247 1.309247 1.309247 ZT20-23 1.19216275 1.19216275 1.19216275