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. Author manuscript; available in PMC: 2018 Aug 17.
Published in final edited form as: J Surv Stat Methodol. 2017 Aug 17;2017:smx018. doi: 10.1093/jssam/smx018

Table 3.

95% confidence interval (CI) coverage percentages for four RDS point and variance estimator pairs by bootstrap CI method

Point Estimator Variance Estimator Bootstrap CI Method Mean Standard Deviation Median Range Acceptable Coverage %*
Sample mean SRS variance N/A 67.4 23.8 74.9 [14, 96] 5
Salganik- Heckathorn Salganik Percentile 87 12.8 91.9 [41, 96] 40
Salganik- Heckathorn Salganik Studentized bootstrap 93 2.8 93.9 [86, 97] 67.5
Volz-Heckathorn Salganik Percentile 87 12.8 91.8 [41, 96] 42.5
Volz-Heckathorn Salganik Studentized bootstrap 92.9 3.2 93.9 [82, 97] 67.5
Successive Sampling Successive Sampling Percentile 94.1 1.8 94.6 [87, 97] 80
Successive Sampling Successive Sampling Studentized bootstrap 93.8 1.8 94.2 [87, 96] 75
*

Acceptable coverage percent is calculated as the percentage of confidence intervals (CIs) with coverage between 93% and 97%, inclusive, for a given estimator pair and bootstrap CI method.