Linked Questions

5 votes
2 answers
24k views

How can you have a non-significant multiple regression model w/ significant predictors? [duplicate]

Possible Duplicate: Not-significant F but a significant coefficient in multiple linear regression How can a regression be significant yet all predictors be non-significant? Significance of ...
Cátia's user avatar
  • 59
1 vote
1 answer
3k views

p-value of t-test versus F-test(joint hypothesis) [duplicate]

SAS code : ...
jw.park.'s user avatar
1 vote
1 answer
257 views

Why R is not significant (and very low), while all predictors are significant? [duplicate]

I used a network logistic regression to regress five predictors against a dependent. They are all significant, instead the R is not significant and it's even very low. I can understand that it may be ...
Mark's user avatar
  • 41
0 votes
0 answers
80 views

How to explain the phenomenon that each coefficient is significant in multiple regression but not significant as simple regression [duplicate]

We know that in linear regression, when each coefficient is not significant in multiple regression but significant as a simple regression, it is most likely the reason of ...
user6703592's user avatar
  • 1,335
3 votes
0 answers
51 views

F test fails but t-test does not? [duplicate]

I'm a bit confused about this. I have a model with multiple variables trying to explain the dependent variable. When I use the F test, I don't pass the critical value. But when I seperate the ...
user avatar
1 vote
0 answers
47 views

Why is it possible to get insignificant F statistic (p>0.1) but significant regressor t-tests (p<0.1)? [duplicate]

My results show significant t-tests but an insignificant F-test. Is this possible or are my calculations wrong?
Ben's user avatar
  • 11
0 votes
0 answers
42 views

Insignificant OLS results but significant IV regression results [duplicate]

I do a regression (Y is a dependent variable and X is an independent variable) OLS gets insignificant results, while the IV regression gets significant results. I based on literature to suggest X is ...
minh minhaof's user avatar
0 votes
0 answers
20 views

Can an F-Test be worse than the two single T-Tests? [duplicate]

Normally when conducting an F-Test one is hoping the F-Test of all variables is significant although the single T-Tests yield insignificant results. But can the reverse also be true? That is a worse ...
Ben's user avatar
  • 11
0 votes
0 answers
14 views

SPSS Output - My Omnibus Test is insignificant, but I have significant predictors [duplicate]

I ran a binary-logistic regression in SPSS. Block 1 shows that the Omnibus Tests of Model Coefficients is insignificant for step, block and model, p =1.06. However, I have two significant predictors ...
Bre Beaver's user avatar
383 votes
84 answers
183k views

What is your favorite "data analysis" cartoon?

Data analysis cartoons can be useful for many reasons: they help communicate; they show that quantitative people have a sense of humor too; they can instigate good teaching moments; and they can help ...
91 votes
10 answers
89k views

Why is it possible to get significant F statistic (p<.001) but non-significant regressor t-tests?

In a multiple linear regression, why is it possible to have a highly significant F statistic (p<.001) but have very high p-values on all the regressor's t tests? In my model, there are 10 ...
Ηλίας's user avatar
  • 1,569
31 votes
10 answers
3k views

What are the myths associated with linear regression, data transformations?

I have been encountering many assumptions associated with linear regression (especially ordinary least squares regression) which are untrue or unnecessary. For example: independent variables must ...
44 votes
2 answers
26k views

Simulation of logistic regression power analysis - designed experiments

This question is in response to an answer given by @Greg Snow in regards to a question I asked concerning power analysis with logistic regression and SAS ...
B_Miner's user avatar
  • 8,680
18 votes
2 answers
13k views

Multiple linear regression for hypothesis testing

I am familiar with using multiple linear regressions to create models of various variables. However, I was curious if regression tests are ever used to do any sort of basic hypothesis testing. If so, ...
cryptic_star's user avatar
  • 1,157
17 votes
2 answers
21k views

multiple regression and multiple comparisons

Say I fit a multiple regression of p explanatory variables. The t-test will allow me to check if any single one of those is significant ($H_0: \beta_i = 0$). I can do a partial F-test to check if some ...
user1357015's user avatar
  • 1,744

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