A colleague was recalculating derived variables from the ACS for a research study and is trying to calculate Margin of Error for population density using guidance here: https://www.census.gov/content/dam/Census/library/publications/2018/acs/acs_general_handbook_2018_ch08.pdf
Should he just assume that the MOE for land area is 0 and use the formula presented there (p.56)? Or is there a different approach he should take for when only the numerator has a published margin of error?