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OpenStudy (anonymous):
True or False? The sum of the differences(picture) is not always 0 for any data set consisting of n observations.
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OpenStudy (anonymous):
OpenStudy (eyust707):
Not 100 percent sure but my guess is true
OpenStudy (anonymous):
it was false
OpenStudy (anonymous):
It has to be zero. If you take out the mean, It is a number whose value is right in the middle of the data. So its deviation's sum from all the value will be 0.
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