Linear Model 3

Question 1

When using linear models with more than one predictor, what three stages do we go through?
1. Which model is ____?
2. Does each ____ in the better model have a statistically ____ relationship with the ____?
3. Which ____ in the better model has the biggest ____ upon the outcome?

Answer 1

1. better
2. predictor, significant, outcome
3. predictor, impact

Question 2

We can compare linear models with different numbers of predictors as long as they are what?

Answer 2

Hierarchical
Hierarchical models must be the same except for the addition of something new

Question 3

What does 𝛥 (delta) mean?

Answer 3

Change

Question 4

b0 (the intercept) is what?

Answer 4

It is always the value of 𝑦 (the outcome) when the predictor(s) are at 0

Question 5

bn represents the change in ____ for every unit change in ____
When there are other ____ in the model, the relationship between ____ and ____ assumes the other predictors are held ____

Answer 5

𝑦 (the outcome)
𝑥𝑛 (a given predictor)
predictors
outcome
predictor
constant

Question 6

unstandardised betas are the change in the ____ for each ____ change in the ____

Answer 6

outcome, unit, predictor
Depends on original scale of measurement
Usually denoted by 𝑏

Question 7

standardised betas are a ____ ____ change in the ____ for each ____ ____ change in the ____

Answer 7

standard deviation, outcome, standard deviation, predictor
Does not depend on original scale of measurement
Usually denoted by 𝛽