selected dataset changing the consequence

The article "Where are the hardest place to live in u.s.", use six data points for each county in the united states to value the level. They are education, median household income, unemployment rate, disability rate, life expectancy and obesity to create an overall ranking.

Thinteresting thing is when we use different standard to value the lowest county, the consequence is totally different. Especially when it talking about the education. General consequense is changed totally when you exclude education attainment. You will find five counties in Mississippi and on the Louisiana rank lower than anywhere in Kentuchy. That also means the education level in these counties is obviously higher than other part.

So I am thinking about what kind of standard and what is your collection of data is vary important and will cause the result different

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