A exponential decay function was fit to the curve using a least squares fit. The actual half-life of radon is 91.75 hours. It is indeed radon in the canister. Experiments are being performed to compare our results with an outside lab. There is some distinct correlation between the data and results, but a more complete data reduction is necessary.
Current investigation is focused on the statistics of counting and error analysis.
There are many variables in the process of measuring radon levels which cannot be determined with any degree of accuracy because they are specific to each environment which is to be measured. Therefore, the results obtained from any test should be viewed as an isolated data point which carries no significant statistical weight.