Table 2 The estimated number of unknown duplicates based on a random sample from each title similarity score range. Confidence intervals for the percentage of hidden duplicates based on the exact binomial confidence interval for the proportion of duplicates in the sample
Score range | D. in sample | D. known | D. unknown (est.) | % hidden |
|---|---|---|---|---|
0.7<x≤0.8 | 7 / 125 (5.6 %) | 2194 | 1957 | 47 (26–64) |
0.8<x≤0.9 | 13 / 100 (13 %) | 3489 | 2265 | 39 (26–51) |
0.9<x≤1.0 | 89 / 209 (43 %) | 5805 | 5393 | 48 (44–52) |