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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Problem with interpretation of regression coefficients

Hi, I have problem with interpretation of regression coefficients. My regression function is: y = a + b1*x + b2*x^2 How can I interpret b1...

• Replies: 5
• Views: 1,700
04-25-2015, 04:01 PM
2. ### Regression Assumptions for different time series models

I am reading a non-statistics book at the moment, which writes about statistics. Not a good constellation, I know. Unfortunately I do not have a...

• Replies: 5
• Views: 1,970
01-13-2014, 09:41 AM
3. ### How to put weights on indenpendent variables in a regression analysis?

Hello, I want to do a regression of a continuous dependent variable (y) (say grams of crystals formed) using several independent variables (also...

• Replies: 5
• Views: 1,674
12-10-2013, 01:03 PM
4. ### Benefits of converting dependent variable to log form?

For regression analysis, what is the benefit of converting the dependent variable to log form. I'm using hourly wages as the dependent variable. ...

• Replies: 5
• Views: 2,358
01-16-2014, 11:11 AM
5. ### WHICH Test Analysis Can I use ?

I am kindly requesting your kind advise. I am doing an analysis for collected data of experimental design using control group, but my participants in...

• Replies: 5
• Views: 2,419
03-04-2014, 01:52 PM
6. ### Linear Regression Help

I am currently running analysis of my data in SPSS, and I am at kind of loss of how to run the

• Replies: 5
• Views: 2,077
03-27-2014, 05:47 AM
7. ### Converting nominal dependent to interval variables through use of dummy variables

Dear all, My research involves the independent interval variable of Socio-Economic Status (SES), the ordinal independent variable of self-efficacy...

• Replies: 5
• Views: 1,574
03-27-2014, 11:41 AM
8. ### Interactions cancel my main effects

I was looking at the effects of : poverty, political interest, satisfaction with democracy and political trust on political participation through...

• Replies: 5
• Views: 1,442
04-15-2014, 03:13 AM
9. ### Logistic regression or ANOVA?

I’m working with a large data set looking at the associations between diabetes and depression with various cognitive outcomes. Specifically, my...

• Replies: 5
• Views: 1,049
04-25-2014, 07:51 AM
10. ### Logistic model - numerical vs. categorical covariates & target

I am using a powerful analytics tool built by Oracle (Data Miner). I am trying to determine the probability of death for a patient given the presence...

• Replies: 5
• Views: 1,900
05-01-2014, 11:30 PM
11. ### Time fixed effects and significance of different models

Hello, I am currently writing my master thesis in economics. However, I might not be as educated in Statistics as you might be, so I hope you...

• Replies: 5
• Views: 2,082
06-03-2014, 12:48 AM
12. ### multi level approach

hi, i have this project to do, but i don't know where to start....Anyone willing to help me ?

• Replies: 5
• Views: 2,172
06-19-2014, 03:57 PM
13. ### OLS assumptions

Dear all, I would like to ask a question concerning two OLS assumptions - a) dependence of observations b) correlation between residuals and...

• Replies: 5
• Views: 2,528
06-22-2014, 05:31 PM
14. ### Multi Variable Regression

Hi, I am trying to do multivariable regression analysis on the following data set. Y={ 707208490, 624915399 , 523124515, 386441119} ...

• Replies: 5
• Views: 1,845
06-17-2014, 11:17 PM
15. ### [Stata - Regression with categorical variables correlated] Multicollinearity

Hello! I'm currently working on my thesis and I have a problem. I'm doing a regression where many variables are categorical ones (profession,...

• Replies: 5
• Views: 3,205
06-21-2014, 08:25 AM
16. ### age groups vs continous

hello everyone, I am curious to know if there are any best practices when dealing with age variables for a logistic regression model. I currently...

• Replies: 5
• Views: 2,371
07-15-2014, 07:06 AM
17. ### Logistic regression, but no negative responses?

So I am trying to model who is likely, from a list of addresses, to go to a store. I have lots of criteria about the people who have visited my...

• Replies: 5
• Views: 1,337
08-12-2014, 10:38 AM
18. ### Multilevel: Include only two dummies of a 7-1 dummy set into random slope?

I am calculating a two-level linear multilevel analysis. A look at the random intercept random slope model showed me a significant decrease in my...

• Replies: 5
• Views: 2,496
10-16-2014, 01:50 PM
19. ### Summarizing time series data

Hello, Thank you very much for taking the time to read this! I have many (~70) time series showing the average body size (kg) for the ~50...

• Replies: 5
• Views: 2,898
10-21-2014, 04:18 PM
20. ### Running multple, multiple regressions? which statistical test should i use?

I have done a study on whether personality and demographics predict interaction on facebook brand pages. I have used a Big five personality scale...

• Replies: 5
• Views: 2,316
11-22-2014, 08:18 AM
21. ### Interpreting multiple regression beta values

Basic question here but just want to double check my understanding.. When I do a multiple regression I get beta values b1=0.01 and b2=0.7 This...

• Replies: 5
• Views: 1,506
11-27-2014, 03:33 PM
22. ### Significance of constant - Mean adjusted values vs. Z scores

Hello everyone, I am trying to run a regression analysis on 2 Inputs and their relationship with 1 Outcome variable across a number of products. I...

• Replies: 5
• Views: 1,733
12-02-2014, 10:23 PM
23. ### Using regression to compensate for matching?

Suppose I am using four groups for a study: South Asian patients, n=41 First Nation patients, n=48 Arabic patients, n=26 South Asian controls,...

• Replies: 5
• Views: 1,583
12-26-2014, 04:51 AM
24. ### Multiple linear regression vs logistic regression

I am not a statistician myself, and haven't done regressions for very long time and have a basic question. I need to do multiple regression for...

• Replies: 5
• Views: 2,453
12-29-2014, 08:18 PM
25. ### Do I need to control for Type 1 errors?

Hi guys, the situation I have is, a reviewer has asked me to reduce my mediation model (MPLUS) as he says I have too many tests going on. In fairness...

• Replies: 5
• Views: 2,265
01-14-2015, 03:09 PM
26. ### Regression / modelling help

Hi All, I'm new here so If I've posted this in the wrong place or its not practical then I apologise. I'm new to regression so helpfully Im...

• Replies: 5
• Views: 2,421
02-15-2015, 08:45 PM
27. ### mixed effect models in R using glmer

Folks, I'm looking for a very basic introduction to mixed effect models in a health care context. Suggestions welcome. Thanks

• Replies: 5
• Views: 1,576
01-21-2015, 07:42 PM
28. ### Linear Regression (Age Interval, 10 years)

Hi guys, I initially ran a linear regression, however we found that age (by year) generated a negligible B coefficient. In response we...

• Replies: 5
• Views: 1,466
02-10-2015, 08:54 AM
29. ### DEA Analysis

Hi, I'm currently looking for some materials on DEA Analysis. Do you guys have any e-books or good webpages on this topic? I seek a material...

• Replies: 5
• Views: 1,979
04-16-2015, 06:57 AM
30. ### predictor 2 on the causal pathway between predictor 1 and outcome

Hi: This is re-post of a something I put in the 'statistics' forum a while ago. There were 75 views but no responses, so I thought I try again in...

• Replies: 5
• Views: 1,451
07-09-2015, 10:02 AM
31. ### Preference Share + Regression

I have conducted a conjoint survey evaluating several combinations of user and devices, with the end goal of calculating a preference share of each...

• Replies: 5
• Views: 1,678
07-15-2015, 03:37 PM
32. ### Multiple mediation analysis

I have a question about multiple mediation analysis. I had originally designed a study to see if four separate variables (M1, M2, M3 and M4) mediate...

• Replies: 5
• Views: 1,457
07-27-2015, 08:32 AM
33. ### Cross validation

Hello, I have a basic question about cross validation and regression model. what is the final regression model made from? I mean the final model...

• Replies: 5
• Views: 2,893
10-01-2015, 12:07 PM
34. ### Does the intercept p value matter?

Hi everyone, I work on a model with logistic regression as a result I have intercept value = 0.06 , with a p-value = 0.86. Does this model...

• Replies: 5
• Views: 2,053
10-17-2015, 04:20 AM
35. ### R Squared and dummy variables

Hey, If you changed your model from one variable to a number of dummy variables, would the R^2 increase considerably, supposing that the dummy...

• Replies: 5
• Views: 3,239
11-03-2015, 02:11 PM
36. ### regression on age groups

Dear All, I have the following question: Estimate a simple regression model of ‘libertarian-authoritarian’ attitude as a function of age groups...

• Replies: 5
• Views: 4,325
11-17-2015, 06:37 PM
37. ### ANCOVA - can I delete a very significant variable from a model's equation?

Hi all, I undertook a sensitivity analysis to study the contribution of explanatory variables to soil organic carbon variations. Here, the...

• Replies: 5
• Views: 1,202
11-24-2015, 07:30 AM
38. ### Calculate estimated median survival time (by hand)

So I have some SAS code: proc lifereg data=surv_data; model event_time * censor(1) = var1 var2 var3 / distribution=weibull; output...

• Replies: 5
• Views: 2,048
12-11-2015, 01:05 PM
39. ### [R]: ROC curve after fitting a logistic model to a new datset

Hello, I have fitted a Logistic Regression model (with 1 binary DV, and several IVs), and then I fitted it to a new dataset using the function...

• Replies: 5
• Views: 1,416
01-23-2016, 06:45 AM
40. ### Regression following MANOVA results

Hi Stats Gurus, This question is about a regression analysis that I want to run, but I am not too familiar with this type of analysis. I have...

• Replies: 5
• Views: 1,641
01-27-2016, 01:18 PM
41. ### Different signs

Hello everybody: I have a litte problem interpreting my regression output. In the first regression, I have a continuous variable with a...

• Replies: 5
• Views: 1,753
01-24-2016, 05:09 AM
42. ### Effects of general participation and intensity of participation

Exploring data from a quasi-experimental study, we want to investigate effects of general participation in a program (dichotomous; part_dich) aswell...

• Replies: 5
• Views: 1,909
02-10-2016, 08:48 AM
43. ### Association between categorical and numerical variables using R

Hi, I am new to this forum so please be kind :-). Not sure if this belongs in 'R'. I will describe my problem as good as I can. First of all I am...

• Replies: 5
• Views: 3,064
02-25-2016, 12:06 PM
44. ### Do I have a non-linear regression?

Hello everyone, I want to start by saying that I don't have too much experience working with continuous dependent variables. I have worked more...

• Replies: 5
• Views: 1,760
05-04-2016, 02:19 AM
45. ### Both categorical and continuous predictors?

I'm sure this is very simple but I just want to be sure. I have actually been searching the web for a while now and can't seem to find a clear...

• Replies: 5
• Views: 1,898
03-21-2016, 04:35 PM
46. ### Ordinal or Multinomial Regression

Hi, If I have a variable called time spend following politics with the following possible responses: No time under half an hour a day...

• Replies: 5
• Views: 1,339
03-28-2016, 06:16 PM
47. ### Can covariates be random variables? (logit)

Hi Everyone. I have been discussing a project at work. My colleague said that he is going to estimate a logit model and include as a covariates...

• Replies: 5
• Views: 1,831
04-18-2016, 05:32 PM
48. ### zero value of the regression parameter

Hello. I would like to ask if anyone knows a website with the theme: regression testing parameter. I need only theory on the topic (to school). Just...

• Replies: 5
• Views: 1,313
04-25-2016, 09:33 PM
49. ### Why do you subtract the mean of a predictor variable from that variable..

An author using temperature as a predictor subtracted its mean value from each temperature data point to deal with "scaling issues." I don't...

• Replies: 5
• Views: 1,501
05-29-2016, 11:33 AM
50. ### Logistic Regression with interactions and contrasts

Hello All, I need some advice for choosing the correct model. I have 3 binary variables: Risk (0 = the person doesn't take financial risks, 1 =...

• Replies: 5
• Views: 1,953
06-08-2016, 09:37 AM

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