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3 8 A polling organization is checking its database to see if the data sources it used sampled the same ZIP codes. The variable Datasource
A polling organization is checking its database to see if the data sources it used sampled the same ZIP codes. The variable Datasource if the data source is MetroMedia, if the data source is DataQwest, and if its RollingPoll. The organization finds that the correlation between fivedigit ZIP code and Datasource is It concludes that the correlation is low enough to state that there is no dependency between ZIP Code and Source of Data. Comment.
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