Efficacious End User Measures—Part 1: Relative Class Size and End User Problem Domains

Table 14

JPTs can be defined in terms of the TPR and FPR. 𝑐_𝑌 and 𝑐_𝑌 are the class sizes in the test set.

Source population
		𝑌	𝑌	Totals ↓
Test result	Positive	𝑐𝑌∗TPR	𝑐𝑌∗FPR	𝑍
	Negative	𝑐𝑌∗(1−TPR)	𝑐𝑌∗(1−FPR)	𝑍
	Totals	𝑐𝑌	𝑐𝑌	𝑁