Linear Regression

Front

What is Linear Regression?

Back

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 does the correlation coefficient (r) indicate?

Back

The strength and direction of a linear relationship between two variables, ranging from -1 to 1.

Front

What does r = -0.89 indicate?

Back

A strong negative correlation between the two variables.

Front

What does r = 0.3 indicate?

Back

A weak positive correlation between the two variables.

Front

What is a scatter plot?

Back

A graphical representation of two variables' values, showing the relationship between them.

Front

What is a trend line?

Back

A line that best represents the data points in a scatter plot, used for making predictions.

Front

How do you interpret a positive correlation?

Back

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

Front

How do you interpret a negative correlation?

Back

As one variable increases, the other variable tends to decrease.

Front

What is the purpose of using linear regression?

Back

To predict the value of a dependent variable based on the value(s) of one or more independent variables.

Front

What is the formula for a simple linear regression line?

Back

y = mx + b, where m is the slope and b is the y-intercept.