Regression

Front

What is regression?

Back

Regression is a statistical method used to determine the relationship between a dependent variable and one or more independent variables.

Front

What does a positive correlation indicate?

Back

A positive correlation indicates that as one variable increases, the other variable also tends to increase.

Front

What does a negative correlation indicate?

Back

A negative correlation indicates that as one variable increases, the other variable tends to decrease.

Front

What is the correlation coefficient (r)?

Back

The correlation coefficient (r) is a numerical measure of the strength and direction of a linear relationship between two variables, ranging from -1 to 1.

Front

What does an r value of 0 indicate?

Back

An r value of 0 indicates no correlation between the two variables.

Front

What does an r value of 1 indicate?

Back

An r value of 1 indicates a perfect positive correlation between the two variables.

Front

What does an r value of -1 indicate?

Back

An r value of -1 indicates a perfect negative correlation between the two variables.

Front

What is the line of best fit?

Back

The line of best fit is a straight line that best represents the data on a scatter plot, minimizing the distance between the line and all data points.

Front

How do you interpret a strong positive correlation?

Back

A strong positive correlation (e.g., r = 0.85) suggests that there is a strong relationship where increases in one variable are associated with increases in the other variable.

Front

What is the purpose of regression analysis?

Back

The purpose of regression analysis is to predict the value of a dependent variable based on the values of one or more independent variables.