Here's the bootstrap refinement of the normal asymptotic interval (Mills and Zandvakili, 1997; Dixon et al., 1987; Efron and Tibshirani, 1997) – where Diversity (div, g) is the Simpson Index calculated from the observed sample, k is the number bootstrap resamples, bs (g star) is the statistic of interest calculated from a bootstrap sample, SEb is the bootstrap estimate of standard error and t is a quantile of the Student t distribution.

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**Tags:** Bootstrap Confidence Intervals, Correction for finite samplesize, Diversity Indices, for loop, R, R Graphs, Simpson Index