A sebed drug analyst who performs weight measurements wants to estinute the uncertainty on the readability of a teoplace balance. As per manufacturer specifications the readability linit is set to odte, while intially she wants to consider a rectangular divibulion, based on her eperience she thinks that the most part of the reading nead so clater toward the center of the distribution rather than exibing a unform spread whin the linits. Conspuncy, she ansumer a briangur aluribution: What is the standard uncertainty? 0.0020 ; 0.0041: 0.0068 0.5030.