14 + 12 10 0+ 1950 1960 1970 1980 1990 2000 2010 Year Rate
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.
Treasury Bills The 3-month Treasury bill interest rate is
watched by investors and economists. Here’s a
of the 3-month Treasury bill rate since 1950:Clearly, the relationship is not linear. Can it be made
nearly linear with a re-expression? If so, which one
would you suggest? If not, why not?
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