how to use hessian matrix when calculating confidence intervals when a function is used to calculate confidence intervals how to determine parameter confidence intervals in r hessian matrix in r how to calculate parameter confidence intervals what is hessian can hessian matrix be used as parameter confidence intervals how to use hessian in optim what is the hessian matrix how to calculate parameter confidence intervals r how to calculate parameter confidence intervals using the hessian matrix how to determine confidence interval for a hessian matrix what is hessian matrix hessian matrix how to use what is the method for calculating parameters how to calculate parameter confidence intervals in r how does hessian calculate confidence intervals r calculate parameter confidence intervals using hessian what is the matrix hessian why use hessian matrix with parameter confidence intervals