Comments on: Excellent feedback so far and some answers to your questions! http://blog.webanalyticsdemystified.com/weblog/2005/07/excellent-feedback-so-far-and-some.html Eric T. Peterson's Web Analytics Demystified weblog, since 2005! Fri, 21 Nov 2008 03:43:36 +0000 http://wordpress.org/?v=2.3.2 By: Phil Aaronson http://blog.webanalyticsdemystified.com/weblog/2005/07/excellent-feedback-so-far-and-some.html#comment-17 Phil Aaronson Wed, 20 Jul 2005 03:23:00 +0000 http://blog.webanalyticsdemystified.com/weblog/2005/07/excellent-feedback-so-far-and-some.html#comment-17 Median, for a lot of distributions won't help much (... and all that sorting). Chances are pretty good that there's a huge tail here and the median value will be 1.<BR/><BR/>A better indicator might be the % of 1 page visits? Median, for a lot of distributions won’t help much (… and all that sorting). Chances are pretty good that there’s a huge tail here and the median value will be 1.

A better indicator might be the % of 1 page visits?

]]> By: Jerry Hosking http://blog.webanalyticsdemystified.com/weblog/2005/07/excellent-feedback-so-far-and-some.html#comment-18 Jerry Hosking Thu, 14 Jul 2005 10:20:00 +0000 http://blog.webanalyticsdemystified.com/weblog/2005/07/excellent-feedback-so-far-and-some.html#comment-18 Does anyone have a simple strategy for calculating the median value for indicators like these?<BR/><BR/>Median Pages Viewed per Visit = (n visits + 1)/2th ranked pages viewed values<BR/><BR/>Well, I guess it's not presented sufficiently simply if you still have to explain it.<BR/><BR/>I can do it, I just don't know how to write it down.<BR/><BR/>- Find number of visits for time period<BR/><BR/>- Add one<BR/><BR/>- Divide by 2<BR/><BR/>- Sort values for pages viewed in each visit (descending)<BR/><BR/>- Choose nth value from the sorted value list where n is the result of (number of visits +1)/2<BR/><BR/>Of course, this is just the simplest of median calculation methods. Others get more complex depending on the data.<BR/><BR/>Don't know if this will help, but it might give you an idea to build on.<BR/><BR/>Jerry Does anyone have a simple strategy for calculating the median value for indicators like these?

Median Pages Viewed per Visit = (n visits + 1)/2th ranked pages viewed values

Well, I guess it’s not presented sufficiently simply if you still have to explain it.

I can do it, I just don’t know how to write it down.

- Find number of visits for time period

- Add one

- Divide by 2

- Sort values for pages viewed in each visit (descending)

- Choose nth value from the sorted value list where n is the result of (number of visits +1)/2

Of course, this is just the simplest of median calculation methods. Others get more complex depending on the data.

Don’t know if this will help, but it might give you an idea to build on.

Jerry

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