sections: add bootstrap

slides/sections/4.md

@@ -222,3 +222,19 @@ Root finding (Brent-Dekker) for $\quad f_{\varepsilon}(x_{\pm}) =
 ## Sample FWHM
 
 ![](images/kde.pdf)
+
+
+## Bootstrap
+
+Estimating confidence interval:
+
+. . .
+
+\Begin{block}{Algorithm}
+::: incremental
+  1. Sample $N$ points from PDF
+  2. Sample with replacement $M$ times
+  3. Apply the test to each new sample
+  4. Compute mean and standard deviation
+:::
+\End{block}