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One approach to the calculation of confidence limits for the median is to use a
binomial distribution with p = 0.5. Several textbooks (e.g. Zar 1999) have lookup tables that rely on this approach.
Bootstrap PLUS .... an alternative approach is to use the computer to take
repeated random samples from sample data (with replacement), calculate a median for each sample, and do this many times (e.g. 1000 times). Finally, sort the medians, and use the middle 95% as the boundaries for a bootstrap 95% confidence interval. |