AFDA Unit 8 Test Review

Front

What is a correlation model?

Back

A correlation model describes the relationship between two variables, indicating how one variable may change in relation to another.

Front

What does a quadratic correlation model look like?

Back

Front

What is linear regression?

Back

Linear regression is a statistical method used to model the relationship between a dependent variable and one or more independent variables by fitting a linear equation to observed data.

Front

What is the equation of a line in slope-intercept form?

Back

Front

What does it mean if the correlation coefficient (r) is close to 1?

Back

If the correlation coefficient (r) is close to 1, it indicates a strong positive linear relationship between the two variables.

Front

What is the significance of a negative correlation coefficient?

Back

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

Front

How do you interpret a scatter plot?

Back

A scatter plot visually represents the relationship between two variables, showing how one variable may change in relation to the other.

Front

What is an exponential function?

Back

Front

What is the formula for calculating the slope of a line?

Back

Front

What does it mean if a relationship cannot be determined from a scatter plot?

Back

It means that there is no clear pattern or trend in the data points, making it difficult to establish a relationship between the variables.