Consider the following multiple regression model : y hat = -6.72 + 0.51x1 - 0.69x2 + 1.452x3 a. What is the mean value of y when x1 = 9, x2 = 4, and x3 = 7? b. write a sentence interpreting the value of ℬ2 hat = -0.69. c. Would the mean value of y be larger or smaller if x2 wereincreased, but x1 and x3 were held constant? Explain in a few sentences. d. If there were an interaction between x2 and x3, what additional predicator variable should be added to the model?
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.
Consider the following multiple regression model :
y hat = -6.72 + 0.51x1 - 0.69x2 + 1.452x3
a. What is the
b. write a sentence interpreting the value of ℬ2 hat = -0.69.
c. Would the mean value of y be larger or smaller if x2 wereincreased, but x1 and x3 were held constant? Explain in a few sentences.
d. If there were an interaction between x2 and x3, what additional predicator variable should be added to the model?
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