The following data gives U. S. population in millions in the indicated year. Year US population (in millions) 1960 180.7 1970 205.1 1980 227.7 1990 249.9 2000 281.4 2010 308.7 Determine the linear regression model. Again t=0 in 1960.
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.
The following data gives U. S. population in millions in the indicated year.
|
Year |
US population (in millions)
|
|
1960 |
180.7 |
|
1970 |
205.1 |
|
1980 |
227.7 |
|
1990 |
249.9 |
|
2000 |
281.4 |
|
2010 |
308.7 |
Determine the linear regression model. Again t=0 in 1960.
Enter the given data in excel as shown below
Go to data -> data analysis -> select regression -> Fill the box as shown below -> result is shown below
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