11/19 - Correlation Coefficient & Linear Regression

Front

What is the correlation coefficient?

Back

A statistical measure that describes the strength and direction of a relationship between two variables.

Front

What does a strong positive correlation indicate?

Back

As one variable increases, the other variable also increases.

Front

What does a strong negative correlation indicate?

Back

As one variable increases, the other variable decreases.

Front

What is linear regression?

Back

A statistical method used to model the relationship between a dependent variable and one or more independent variables.

Front

What is the purpose of a best-fit line in linear regression?

Back

To make predictions based on the data.

Front

How do you interpret the slope of a linear regression line?

Back

The slope indicates the change in the dependent variable for a one-unit change in the independent variable.

Front

What is the y-intercept in a linear equation?

Back

The value of the dependent variable when the independent variable is zero.

Front

What does it mean if the correlation coefficient is close to 0?

Back

It indicates a weak or no linear relationship between the two variables.

Front

How can you determine if a correlation is strong or weak?

Back

By looking at the correlation coefficient value; values closer to 1 or -1 indicate strong correlation.

Front

What is the formula for a linear regression equation?

Back

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