why use mcmc method can normal approximation be used for optimizing mcmc? what is the function of normal approximation of posterior distribution can you use normal approximate to improve mcmc how do i improve mcmc when do you use pymc how to optimize mcmc can an efficient mcmc be improved how to get the mcmc model how to make a mcmc efficient can you use normal approximation in mcmc which approximation is used to create a mcmc what is the function of standard approximation of the posterior? how to use normal approximation in mcmc how efficient can mcmc be? what approximation should mcmc use what is mcmc and norm approximation how can i improve an efficient mcmc what makes an efficient mcmc can you use normal approximation to create mcmc