I thought it would be fun to post this statistical analysis that I use when teaching some basic statistical concepts. Below are my costs per chip on e-bay over the last 4-5 years of purchasing Paulsons in all kinds of shape, all kind of molds...
Control Chart showing the average cost and the 2 controls limits (about 3 sigma on each side)
Control Chart showing the average cost and the 2 controls limits (about 3 sigma on each side)