Using the NCS-R data and a statistical software procedure of your choice, compute a weighted estimate of the total number of U.S. adults that has ever been diagnosed with alcohol dependence (ALD) along with a 95% confidence interval for the total Make sure to incorporate the complex design when computing the estimate and the confidence interval. Compute a second 95% confidence interval using an alternative variance estimation technique, and compare the two resulting confidence intervals. Would your inferences change at all depending on the variance estimation approach?