Penny Data

There was an error in class today. I am not going to say who caused the error, I will take responsibility.

However, the data on the board for the pennies was wrong. For some reason everyone just posted the uncertainty in the mass for each year. You need the average mass and the uncertainty. Here is some data from a previous class. You can use this to create a graph of mass vs. year.

Note that some of the uncertainties are reported incorrectly. You should just have 1 sig fig in the uncertainty and the digits for the average should match the uncertainty.