Doing the 99% certainty part I'm pretty sure requires that you calculate a confidence interval http://en.wikipedia.org/wiki/Confidence_interval http://en.wikipe

Doing the 99% certainty part I'm pretty sure requires that you calculate a confidence interval http://en.wikipedia.org/wiki/Confidence_interval http://en.wikipedia.org/wiki/Confidence_interval although that article hasn't helped me remember how to do that