elow the mean, and the upper number two standard deviations above. Nothing fancier is possible, in terms of input probability distributions.</p>
    <p>And of course, this is not a statistician's tool. Use the Unsure Calculator for back-of-a-napkin calculations. For anything more involved, use one of the free or paid statistical tools, a full programming environment, or hire a statistician.</p>
    <p>I hope some people will find this tool useful, despite the limitations and despite its spartan design.</p>
