a. Write out the estimated regression equation for the relationship between the variables. b. Compute the coefficient of determination. What can you say about the strength of this relationship? c. Carry out a test to determine whether y is significantly related to the independent variables. Use a 5% level of significance.
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.
a. Write out the estimated regression equation for the relationship between the variables.
b. Compute the coefficient of determination. What can you say about the strength of this relationship?
c. Carry out a test to determine whether y is significantly related to the independent variables. Use a 5% level of significance.
d. Carry out a test to see if x3 and y are significantly related. Use a 5% level of significance.
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