The article “A Probabilistic Model of Fracture in Concrete and Size Effects on Fracture...

The article “A Probabilistic Model of Fracture in Concrete and Size Effects on Fracture Toughness” (Magazine of Concrete Res., 1996: 311–320) gives arguments for why fracture toughness in concrete specimens should have a Weibull distribution and presents several histograms of data that appear well fit by superimposed Weibull curves. Consider the following sample of size n = 18 observations on toughness for high-strength concrete (consistent with one of the histograms); values of p_i =(i–.5)/18 are also given.

Construct a Weibull probability plot and comment.