Chapter 2 TEST

Front

Y-hat is the ________ value of y for a given value of x.

Back

Predicted

Front

To make a prediction using the regression line, you would...

Back

plug in a value for x and simplify

Front

Interpret the slope of the Least Squares Line Equation.

Back

As hours increases by one, income will increase by 31.45

Front

Which is the best CONTEXTUAL description of the y - intercept for the linear regression equation of the rats: Weight = 100 + 40(Time)?

Back

The y-intercept is 100, which means the rat is predicted to weigh 100 grams at birth.

Front

A ____________ regression line makes the residuals as small as possible.

Back

good

Front

What does the slope of a regression line represent?

Back

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

Front

What is a residual in regression analysis?

Back

The difference between the observed value and the predicted value.

Front

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

Back

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

Front

How do you calculate the predicted value (y-hat) using a regression equation?

Back

By plugging in the value of x into the regression equation.

Front

What is the purpose of a scatter plot in regression analysis?

Back

To visualize the relationship between two variables.