Preliminary test data for the Guild room coffee project

Data for the preliminary test of the Guild room coffee project (http://onsnetwork.org/koalha/), which tries to find out whether the mass of one measure of coffee depends on the measure, measurer and coffee itself. Two labels of coffee were measured with two different measures to find out, which variables are worth measuring on a larger scale. Each combination of variables was measured 10 times, for a total of 40 measurements. The plastic measure was a standard one, while the metallic measure was slightly bigger.