Lecture 19

Question 1

What does the slope of the line in linear regression indicate?

Answer 1

The strength of the relationship

Question 2

What does a steep slope indicate?

Answer 2

A stronger relationship

Question 3

What does a flat slope indicate?

Answer 3

A weaker relationship

Question 4

What is the equation for a regression line?

Answer 4

y = a + ( b x X)

Question 5

In the equation for a regression line, what does (a) represent?

Answer 5

The y-intercept

Question 6

In the equation for a regression line, what does (b) represent?

Answer 6

The strength and direction of the relationship

Question 7

In the equation for a regression line, what does (X) represent?

Answer 7

The predictor value

Question 8

Can regression be used to identify cause and effect?

Answer 8

No, but it can suggest a causal relationship