Sample survey A polling organization is checking its da-tabase to see if the two data sources it used sampled the same zip codes. The variable Datasource = 1 if the datasource is MetroMedia, 2 if the data source is DataQwest,and 3 if it’s RollingPoll. The organization finds that thecorrelation between five-digit zip code and Datasource is-0.0229. It concludes that the correlation is low enoughto state that there is no dependency between Zip Codeand Source of Data. Comment.
Correlation
Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.
Linear Correlation
A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.
Regression Analysis
Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.
tabase to see if the two data sources it used sampled the
source is MetroMedia, 2 if the data source is DataQwest,
and 3 if it’s RollingPoll. The organization finds that the
-0.0229. 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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