Stats Chapter 3

Front

What does a correlation coefficient of r = 0.3 indicate about the data?

Back

Weak positive correlation.

Front

What is the Coefficient of Determination?

Back

r squared.

Front

Calculate the linear regression equation for the following data: y = 1.5x + 12.

Back

y = 1.5x + 12.

Front

Using the linear regression equation y = 61.93x - 1.79, predict the distance traveled after 10 hours.

Back

617.5 miles.

Front

Calculate the linear regression equation for the data: y = 61.93x - 1.79.

Back

y = 61.93x - 1.79.

Front

What is the meaning of a strong positive correlation?

Back

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

Front

What does the slope in a linear regression equation represent?

Back

The slope represents the rate of change of the dependent variable with respect to the independent variable.

Front

What is the formula for the linear regression equation?

Back

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

Front

What does a negative slope in a linear regression indicate?

Back

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

Front

How do you interpret the y-intercept in a linear regression equation?

Back

The y-intercept is the value of y when x is 0.