Errror Quoted for Electrical Components. What is it? (Where do I post electrical engineering homework questions? I'm home. I'm working. OK, maybe I'm not really working.) Manufacturers quote a percent variation from nominal value for their parts. What does this percent error even mean?? For a 5% error, does this mean that each and every part is within 5% of the quoted value. Is the distributions flat, or is it Gaussian in shape? If the manufacturer also sells a 2% version, does this mean that the 5% parts will have the middle 2% missing as these parts are selected-out?