Question- Last lab the topic was lipid content, professor gave us the Bluebird thick cut chips as sample, my group tested twice, the first result is 21.26% and the second one is 21.48%. So the mean is 21.37%. they are very close. But the maen value of results from another group is 18.29%. Why the lipid content can be so different as the experiments were all taken at the same time and same environment. the samples were all from the same bag.
Express your answer using two significant figures.