Realtive Test

Question 1

Do you think a linear model/ regression is appropriate here

Answer 1

Correlation?

2 var numerical?
Straight enough?
No outliers?
Plot does not thicken?

Question 2

R

Answer 2

Correlation

Question 3

R squared

Answer 3

Determination

Question 4

Extrapolation

Answer 4

If the number they are asking for is out of the range of the numbers they give us it is extrapolation

Question 5

Interpret the slope of your model in context

Answer 5

For every increase of (x) we expect (y) to (increase or decrease)
by (slope)

Question 6

Interpret the intercept of your model in context

Answer 6

We expect the (y) to be (y-int) when (x) = (what ever) this ( is or is not realistic)

Question 7

What is the correlation between cost and size

Answer 7

R= (whatever)

Direction, strength, linear or curve

Question 8

Explain the meaning of R squared in the context of this problem

Answer 8

(R squared) percent of variation in (Y) is explained by the variation in (X)

Question 9

Talks about positive or negative residual or a positive residual from this model?

Answer 9

E= y- y^

What you get - what you should get

Question 10

Use re express’s data to create a model

Answer 10

Run line reg and put the equation

Question 11

Association

Answer 11

Strength
Form
Direction

Question 12

Interpt r^2

Answer 12

R^2 percent of the variability in y is explained by variability in x