All Questions
6 questions
0
votes
1
answer
589
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One of the main effects not significant, but interaction term significant
A is significant
B is not significant
A x B is significant
Do I say that
(1) There exists a ...
- 165
0
votes
0
answers
395
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Joint Significance of Interaction Term in LPM / OLS
In an OLS model with binary dependent variable (linear probability model) I have (among others) two independent binary variables (ß1 and b2) which interact with each other (ß1 * ß2).
...
- 13
9
votes
2
answers
3k
views
p-values change after mean centering with interaction terms. How to test for significance?
I assumed the following interaction model:
$$y = \beta_0 + \beta_1 x_1 + \beta_2 x_2 + \beta_3 x_3 + \beta_4 x_2 x_3$$
And then applied mean centering:
$$y = \beta_0 + \beta_1(x_1 - \bar{x_1}) + \...
- 1,071
2
votes
1
answer
2k
views
Interaction term is significant WITHOUT main affects... AND main effects are significant WITHOUT interaction term?
I am trying to determine the effect of a person's weight and the incline that they are running over on their running speed. I'm just using a simple linear model in R, but I get a weird situation where ...
- 63
1
vote
1
answer
736
views
Significance of the sum of the main effect and interaction term
Consider a simple linear regression with an interaction term:
$Y=b_0 + b_1X +b_2Z+b_3XZ$
where $X$ is continuous and $Z$ is a dummy.
I want to find out whether $X$ has a significant impact on $Y$ ...
- 497
13
votes
1
answer
53k
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The main effect will be non-significant if the interaction is significant? [duplicate]
I am using linear mixed models to identify important factors, and it turns out that:
A: significant
B: not significant
...
- 1,345