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We evaluated costs using different values of ョ.
We then compare the cost of the cost-based optimal result
C_cost with the cost of the accuracy-based optimal result
C_accuracy. This comparison is achieved by calculating the ratio
of the two costs R where the cost of the cost-based optimal
result is the numerator. In this figure we plot the value of R for various values of ョ. When ョ = 0 then false positive errors do not cost anything and therefore it is optimal to always choose a positive outcome in which case R = 0. If ョ = 1 then this corresponds to unit costs for both types of errors and hence the resulting optimal probabilities are the same that would be obtained for accuracy and hence in this case we get R = 1. |