Regression and Correlation Flashcards
1
Q
What is correlation ?
A
Measures linear association between two variables: range from -1 (inverse) to +1 (direct).
Includes a P-value testing the null hypothesis that r = 0
Assumptions: Bivariate Normal distribution; verify via scatter plots.
r2 - Proportion of variance explained by the other variable.
2
Q
What is simple linear regression ?
A
3
Q
How do you interpret a positive correlation coefficient?
A
As one variable increases, the other also increases.
4
Q
What does the slope coefficient in simple linear regression indicate?
A
The expected change in the dependent variable for a one-unit increase in the independent variable.
5
Q
What does the intercept in a simple linear regression model represent?
A
