what is the purpose of a robust what is the distribution used instead of the t distribution? what distribution is used for robust confidence intervals what is the normal distribution for confidence intervals why is it called a robust confidence interval which distribution is used for confidence intervals what is the t distribution in r what is t distribution what is the difference between robust and heteroskedasticity consistent in r what type of distribution is hc3 does a robust matrix follow the normal distribution? what distribution is used for robust confidence intervals what to do for robust confidence intervals what distributions are used for covariance estimators what is the robust t-distribution? what type of distribution is homoskedasticity consistent what is the difference between t-distribution and normal distribution in r what is t distribution in r what is the name of the function to create a robust confidence interval which of the following is an example of an independent robust distribution?