Table 2.

Sample size required according to the expected precision and recall and total width of confidence intervals (CIs).

Range of CI	Expected precision or recall values
	0.1	0.2	0.3	0.4	0.5	0.6	0.7	0.8	0.9
90% CI	35	61	81	92	96	92	81	61	35
95% CI	138	246	323	369	384	369	323	246	138