Distribution of Masses List the masses of all pennies made in or after 1983 in a single column, sorted from lowest to highest mass. There should be at least 300 masses listed. Divide the data into 0.01-g intervals (e.g., 2.480 to 2.489 g) and prepare a bar graph, like that shown in Figure 1. Find the mean (x), median, and standard deviation (s) for all coins in the graph. For random (Gaussian) data, only 3 out of 1000 measurements should lie outside of x 3s. Indicate which bars (if any) lie beyond 3s. In Figure 1 two bars at the right are outside of 3s.