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May 24, 2022
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Point to new weights user guide #913

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13 changes: 7 additions & 6 deletions docs/symptom-survey/weights.md
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Expand Up @@ -12,9 +12,10 @@ by Facebook. These weights are also used to produce our
[public contingency tables](./contingency-tables.md) and the geographic aggregates
[in the COVIDcast Epidata API](../api/covidcast-signals/fb-survey.md).

Facebook has provided documentation to describe the calculation and usage of
these weights, [available here](symptom-survey-weights.pdf). This documentation
explains the weight methodology, gives examples of how to use the weights when
calculating estimates, and states the known limitations of the weights. We also
have separate information about the [survey's limitations](limitations.md) that
affect what conclusions can be drawn from the survey data.
Facebook has developed a [User Guide for the CTIS
Weights](https://dataforgood.facebook.com/dfg/resources/user-guide-for-ctis-weights)
(updated May 2022). This manual explains the weight methodology, gives examples
of how to use the weights when calculating estimates, and states the known
limitations of the weights. We also have separate information about the
[survey's limitations](limitations.md) that affect what conclusions can be drawn
from the survey data.