This work was supported by the Engineering Research Centers Program of the National Science Foundation under Award 0313747, which is better known as CASA or the Collaborative Adaptive Sensing of the Atmosphere. This paper was conducted by researchers in CASA’s end-user integration group. The authors wish to thank Benigno Aguirre and three peer reviewers for their thoughtful critiques of earlier drafts as well as Havidán Rodríguez and the many undergraduate and graduate students who worked on this project’s data collection efforts. Finally, we would also like to thank Brenda Philips for suggesting that we give priority to this analysis. Any opinions, findings, and conclusions expressed in this material are those of the authors and do not necessarily represent those of any supporting individuals or agencies.
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Contact rates measure the number of phone numbers that we were able to determine were eligible or ineligible for participation.
Cooperation rates measure the percentage of eligible households that agreed to participate in the survey.
Refusal rates measure the percentage of eligible households that refused to participate.