guidance for what level of aggregated MOE is too large for estimate to be useful

[sastoudt]

From this paper (page 3):

"There is no CV level that is universally accepted as “too high,” but a comprehensive report on the ACS [5] describes a range of 0.10 to 0.12 as a “reasonable standard of precision for an estimate” (p. 64)"

CV = (MOE / 1.645) / estimate

[sastoudt]

helper function here