Homework#6 (Flashcardziz) U1LC#1 Review Problems

Front

What are residuals in statistics?

Back

Residuals are the difference between the observed response and the values predicted by the model.

Front

What type of association does a negative correlation indicate?

Back

A negative correlation indicates that as one variable increases, the other variable decreases.

Front

What does a scatter plot represent?

Back

A scatter plot is a graph that shows the relationship of two data sets.

Front

What does the y-intercept represent in a linear regression equation?

Back

The y-intercept represents the predicted value of the dependent variable when the independent variable is zero.

Front

How does the value of a car change as it ages?

Back

As the age of the car increases, its value decreases.

Front

What is a positive correlation?

Back

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

Front

What is the purpose of linear regression?

Back

Linear regression is used to model the relationship between a dependent variable and one or more independent variables.

Front

What does it mean if a scatter plot has no correlation?

Back

If a scatter plot has no correlation, it means there is no discernible relationship between the two variables.

Front

What is the formula for a linear regression line?

Back

The formula for a linear regression line is typically written as y = mx + b, where m is the slope and b is the y-intercept.

Front

What is the slope in a linear regression equation?

Back

The slope indicates the rate of change of the dependent variable for each unit change in the independent variable.