... outcome converges to a number, the probability of the outcome, as the number of observed outcomes increases.
For calls to the agent, the relative frequency of calls that are easily resolved settles down to 70%. We say that the probability of an easy call is 0.7.
The LLN does not apply to every situation. The LLN applies to data like those for the call center in Figures 7.1 and 7.2 because these data don’t have a pattern. The variation is simple as defined in the example of financial time series (p. 769). Weird things can happen for data with patterns. In some cases, the accumulated relative frequency does not settle down. For instance, suppose an agent handles the first 2 calls, forwards the next 4, handles the next 8, forwards the next 16, and ...
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