In this lab, you can observe the radioactive decay of 400 radioactive nuclei. You can choose from three different half-lives. Note that the nuclei turn blue when they have decayed, and the smooth purple line on the graph shows the ideal case. An actual case can deviate a bit from the ideal case because of statistical fluctuations (which make more of a difference when the number of nuclei is small, as it is here). See if you can estimate the half-life in the three cases shown here.