To determine the uncertainty of a probability derived from experimental data, one can apply the technique of propagation of uncertainty. This involves recognizing that the data used to calculate the probability has its own uncertainty, which affects the final probability value. In the example given, where the probability is 46/234, the uncertainty can be calculated based on the number of trials and the observed outcomes. While external resources like PDFs can provide guidance, they may not directly address specific questions about individual calculations. Understanding how to apply these principles is crucial for accurately reporting experimental probabilities.