[tor-bugs] #19544 [Metrics/Metrics website]: Add graph on bridge users by country and transport

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#19544: Add graph on bridge users by country and transport
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 Reporter:  karsten                  |          Owner:
     Type:  enhancement              |         Status:  needs_review
 Priority:  Medium                   |      Milestone:
Component:  Metrics/Metrics website  |        Version:
 Severity:  Normal                   |     Resolution:
 Keywords:                           |  Actual Points:
Parent ID:                           |         Points:
 Reviewer:                           |        Sponsor:
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Comment (by iwakeh):

 Looks fine.

 Using the reported numbers for deriving (a sample of) a joint distribution
 of a request being from a certain country and using a certain transport,
 the bounds follow from basic (discrete) probability theory:
 * The upper bound b/c of the monotony of a probability measure
 * The lower bound can also be easily derived using probability axioms and
 the given condition.
 * The 'middle' is based on the assumption that country of origin is
 independent of the request's type of transport, which doesn't have to be
 the case (as mentioned in the description). This number depicts just one
 class of special distributions, where the exact value could be computed.
 Thus, it's good to **not** display it (at least I didn't see it in the
 graphs). Is there a reason why it is computed?

 Without additional information the bounds cannot be improved.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19544#comment:3>
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