Wednesday, August 6, 2008

Reality Check: JD Power needs new data analysts

At least we don't charge anything for our faux-analysis ;-) What is lost in the new JD Power and Associates survey is how insignificant the difference is in terms of customer satisfaction.

Out of 1000 fictional points, the difference between the camera lines is 3 to 8 points. I'm assuming their margin of error is higher than that? So, if one uses their brain to analyze their results, here is the summary: they are all the same in terms of customer satisfaction.

To make this point even more clear, consider this: camera line #1 has 1% more "satisfaction points" than camera line #2, and camera line #2 has 1% more "satisfaction points" than camera line #3. And to get to 1% we had to round-up :-)

Now excuse me while I drink my wonderful 675-point coffee while I throw away the junk that got 671-points out of 1000 :)

Reality checks are painful :-)

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