Atomic Mass of Candium Lab

During the Atomic Mass of Candium Lab we had to separate the different types of isotopes and find the percent abundance for each of them. We also had to find the masses of each isotope and the averages for each type. We then had to calculate the average atomic mass for candium.

Ask a group nearby what their average atomic mass was. Why would your average atomic mass be different than theirs?

Our average atomic mass was 0.77 and another group's was 1.2. We concluded that we would get a different answer then another group because since it was a small sample, it is more likely for there to be irregularities within the data and not every group had the same sample size.

If larger samples of candium were used, for example if I gave you a whole backpack filled with candium, would the differences between your average atomic mass and others' average atomic masses be bigger or smaller?

If we had larger samples of candium, the difference between our average atomic mass and another group's would be smaller because statistically, larger sample sizes mean that there will be less variation in the data. 

If you took any piece of candium from your sample and placed it on the balance, would it have the exact average atomic mass that you calculated?

If we took any piece of candium from my sample and placed it on the balance, it would not have the exact average atomic mass that we calculated because it is nearly impossible for a data point to be the exact average, but it would be close.