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re: "Half the schools are below average" - not always true
Posted on 9/30/14 at 10:40 am to SpidermanTUba
Posted on 9/30/14 at 10:40 am to SpidermanTUba
The larger the sample then the percentage of schools above or below the average of that same sample approaches 50%. Therefore the headline "Half the schools are below average" becomes more and more stupid. That is his point. Unless you believe that your specific group of schools in your state / region should be superior for some reason, seeing that half are below average shouldn't alarm anyone.
1
Posted on 9/30/14 at 10:44 am to mmcgrath
quote:
The larger the sample then the percentage of schools above or below the average of that same sample approaches 50%
NOT GENERALLY TRUE
This only happens if the underlying distribution of scores is normal.
quote:
...seeing that half are below average shouldn't alarm anyone.
I agree. In fact that's a GOOD thing, IMO.
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