pub fn bootstrap(
data: &[f64],
n_resamples: usize,
stat_fn: usize,
seed: u64,
) -> Result<(f64, f64, f64, f64), String>Expand description
Bootstrap confidence interval for a statistic (e.g., mean).
Returns (point_estimate, ci_lower, ci_upper, standard_error).
stat_fn is 0=mean, 1=median.