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[survey] Describe regional requirement for inclusion #707

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Sep 14, 2021
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[survey] Describe regional requirement for inclusion #707

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10 changes: 10 additions & 0 deletions docs/api/covidcast-signals/fb-survey.md
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Expand Up @@ -643,6 +643,16 @@ declines, some indicators will become unavailable once they no longer meet the
This affects some signals, such as those based on a subset of responses, more
than others, with finer geographic resolutions becoming unavailable first.

### Target Region

Facebook only invites users to take the survey if they appear, based on
attributes in their Facebook profiles, to reside in the 50 states or
Washington, DC. Puerto Rico is sampled separately as part of the
[international version of the survey](https://covidmap.umd.edu/). If Facebook
believes a user qualifies for the survey, but the user then replies that they
live in Puerto Rico or another US territory, we do not include their response
in the aggregations.


## Survey Weighting

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8 changes: 8 additions & 0 deletions docs/symptom-survey/contingency-tables.md
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Expand Up @@ -73,6 +73,14 @@ CSVs for the month of January 2021 only use data from January 6-31 due to a

At the moment, only nation-wide and state groupings are available.

Facebook only invites users to take the survey if they appear, based on
attributes in their Facebook profiles, to reside in the 50 states or
Washington, DC. Puerto Rico is sampled separately as part of the
[international version of the survey](https://covidmap.umd.edu/). If Facebook
believes a user qualifies for the survey, but the user then replies that they
live in Puerto Rico or another US territory, we do not include their response
in the aggregations.

### Privacy

The aggregates are filtered to only include estimates for a particular group
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10 changes: 10 additions & 0 deletions docs/symptom-survey/survey-files.md
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Expand Up @@ -104,10 +104,20 @@ Responses qualify for inclusion in these files if they meet the following condit
open-ended question (A2, A2b, B2b, Q40, C10_1_1, C10_2_1, C10_3_1, C10_4_1,
D3, D4, D5) means to provide any number (floats okay) and to “answer” a radio
button question is to provide a selection
* starting September 2021, indicated that they live in the 50 states or
Washington, DC

We do not require the user to have completed the survey, or to have seen all
pages of the survey.

Facebook only invites users to take the survey if they appear, based on
attributes in their Facebook profiles, to reside in the 50 states or
Washington, DC. Puerto Rico is sampled separately as part of the
[international version of the survey](https://covidmap.umd.edu/). Starting in
September 2021, if Facebook believes a user qualifies for the survey, but the
user then replies that they live in Puerto Rico or another US territory, we do
not include their response in the individual response data.

## Collisions

One thing we haven't been able to fully fix is the problem of people forwarding
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