Table 19.2
Contingency Table Cross-Classifying Forecasts of A and Observations Y
Table 19.3
Contingency Table Cross-Classifying Forecasts of B and Observations Y
Here A and B are 
binary point forecasts. If forecast skill is measured by the Brier score, then A performs better than B since its Brier score is about 
, less than B’s score of
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