Regressions

Front

What is a correlation coefficient?

Back

A numerical measure of the strength and direction of a relationship between two variables, ranging from -1 to 1.

Front

What does a correlation coefficient of -0.75 indicate?

Back

A strong negative correlation, meaning as one variable increases, the other tends to decrease.

Front

What type of regression model is used for data that follows a curved pattern?

Back

Quadratic regression model.

Front

What does a correlation coefficient of 0 indicate?

Back

No correlation between the two variables.

Front

What type of regression model is best for data that grows exponentially?

Back

Exponential regression model.

Front

What is a scatter plot?

Back

A graphical representation of two variables, showing the relationship between them using points.

Front

What does a positive correlation mean?

Back

As one variable increases, the other variable also tends to increase.

Front

What is the purpose of regression analysis?

Back

To model the relationship between a dependent variable and one or more independent variables.

Front

What is the difference between linear and non-linear regression?

Back

Linear regression models a straight-line relationship, while non-linear regression models curved relationships.

Front

What does a strong positive correlation look like on a scatter plot?

Back

Points that are closely clustered around an upward-sloping line.