Ahodges/doc/doc1117

@mulby , @shnayder , @WatsonEmily , @mhoeber , @catong , @srpearce , @stroilova , @dsjen please review. I do not yet have images to illustrate my examples, but otherwise ready.
The student location data that edX Insights presents does not come from the value that the student selected in the **Country** list.

or

The value that students select in the **Country** list does not determine the student location data that edX Insights presents.

or 

EdX Insights does not use value that students select in the **Country** list to determine student location data.