Module 11

Question 1

What is the sum of squares error measuring?

Answer 1

Distance between predicted and actual value of y

Question 2

If the standard deviation of points around the regression line are small, what does that tell us about r^2?

Answer 2

r^2 is big; stronger correlation

Question 3

What is the null hypothesis for regression hypothesis testing?

Answer 3

The slope is 0

Question 4

What is another way of phrasing what hypothesis testing for regression is testing?

Answer 4

The correlation is 0 or != 0

Question 5

What does it mean if p>alpha in this context?

Answer 5

There is no statistically significant correlation

Question 6

What if p<alpha in this context?

Answer 6

There is evidence for correlation