This is a pretty basic question but I can't seem to find a concise explanation online, and I'm pretty new to the ACS! I'm just looking up general data on the racial/ethnic make-up of Illinois and Illinois counties in 2016 (using 2012-2016 ACS 5-Year Estimates). For those who identify as Hispanic or Latino, many of the counties are missing MOE data and instead have five asterisks (*****). The explanation the ACS provides is: "An '*****' entry in the margin of error column indicates that the estimate is controlled. A statistical test for sampling variability is not appropriate." Does this mean that the estimates the ACS provides in these cases are not valid/reliable? I'd like to calculate a coefficient of variation for these estimates but I can't do it without a margin of error. Any help would be greatly appreciated!
In reply to Mark Mather: