... Archives . ... In the XSPEC packages, the parametric bootstrap is command FAKEIT, which makes Monte Carlo simulation of specified spectral model. XSPEC does not provide a nonparametric bootstrap capability. Parametric Bootstrap: $$X_1^*,?, X_n^* \sim F(\cdot;\theta_n)$$ . Both $$\sqrt{n} \sup_x |F_n(x)-F(x;\theta_n)|$$ and $$\sqrt{n} \sup_x |F_n^*(x)-F(x;\theta_n^*)|$$ have the same limiting distribution. ... Nonparametric Bootstrap: $$X_1^*,?, ... Comment ( RSS ) | ... Chandra Blog . ...