Unit 12 - Inference on Linear Regression

Question 1

b₁

Answer 1

estimated slope

Question 2

b₀

Answer 2

estimated y-intercept

Question 3

ß₁

Answer 3

true slope

Question 4

ß₀

Answer 4

true y-intercept

Question 5

What does the null hypothesis: ß_{1 = 0} mean?

Answer 5

There is not a linear association between x and y.

Question 6

What is extrapolation?

Answer 6

Using a regression model to predict a value outside the range of the data

Question 7

What is interpolation?

Answer 7

Using a regression model to predict a value that is within the range of the data

Question 8

Before doing a linear regression t test, you should check to see…

Answer 8

if the scatterplot of the data looks linear.

Question 9

If zero is in the confidence interval for a linear regression t interval, we can conclude…

Answer 9

there is not sufficient evidence to suggest a linear association betweeen x and y