We recently did a Resistance in Circuits lab. My coded resistances were 33, 100 and 220. The measured resistance was 33.3, 101.6 and 219 So we did 3 setups. (Series, Parallel and Combination) Series = 351.8 measured ohms Parallel = 22.5 measured ohms Combinations = 101.5 measured ohms The links below are scanned images of my work. http://img.photobucket.com/albums/v600/bozym618/seriesandparallel.jpg http://img.photobucket.com/albums/v600/bozym618/combination.jpg I am confused on what i am comparing. I find the calculated Req with the uncertainty... so I am comparing that to the measured, but i am confused on what to do with the uncertainty. I need to find the discrepancy and say if it is signi. or insigni. For Parallel i found, 22.5 -22.3 = 0.2 and the error was 0.141 So its Sig. But the rest confused me. I hope someone can help me understand. thanks in advance.