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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### f-test, regression to polynomial

Hi, I am in over my head and could use some guidance. For an assignment, I have divided the data into two classes (arbitrary) and used only one to...

• Replies: 0
• Views: 1,549
10-13-2012, 06:27 PM
2. ### P-Values equal to zero

Hi, I am running simple OLS regressions on forward and spot price data and have been getting p-values equal to exactly 0 (i.e. not 0.0000000234) for...

• Replies: 1
• Views: 1,549
04-30-2015, 10:05 PM
3. ### Linear Regression with effect size changes of categorical variables with continuous

I have three categorical variables (disked, herbicide, Lands) each is binomial (0,1). For example, within disked there is a group in which it does...

• Replies: 3
• Views: 1,549
07-27-2015, 02:21 PM
4. ### Weather Prediction

I am looking at past temperature, solar angle, and wind vectors to develop a prediction of the temperature in the next hour. What would be the...

• Replies: 0
• Views: 1,548
06-01-2011, 01:29 PM
5. ### Interaction between time and time-varying between-subjects variable

I'm struggling with how to think about a question that seems like it should be really straightforward. I have some survey data about regrets...

• Replies: 6
• Views: 1,548
08-01-2014, 05:35 PM
6. ### Panel Data Model. Problem !

Hi everyone, First, Ihave to mention that I am newbie in statistic so I may have some evident questions ! Actually, I am working on a...

• Replies: 2
• Views: 1,548
03-23-2015, 11:51 AM
7. ### Non-parametric causality test

how can i rank-transform 3 variables in eviews or stata to perform non-parametric causality test? please help

• Replies: 0
• Views: 1,547
04-22-2013, 03:15 PM
8. ### Matching

Dear experts, For a fMRI (functional brain scan) experiment, I am comparing scans from 40 subjects with a condition that may or may not affect the...

• Replies: 0
• Views: 1,547
01-27-2014, 06:54 AM
9. ### Trouble with GLMs (Using R)!

Greetings! I've been trying to analyse some data for a while now, and I have found what I think the best model for my GLM is. However, I have friends...

• Replies: 4
• Views: 1,546
01-02-2013, 04:52 PM
10. ### Non linear regression and under-/overvaluation calc.

As you know the Security Market Line is used to find under- or overvalued securities (if they plot below or above the SML). I am doing something...

• Replies: 0
• Views: 1,545
07-04-2010, 11:31 PM
11. ### Non-linear modelling with several variables including a categorical variable

Hello everyone, I am trying to model some data regarding a predator prey interaction experiment (n=26) in R. Predation rate is my response...

• Replies: 0
• Views: 1,545
07-03-2013, 03:11 AM
12. ### Bias in Regression Parameter Estimates

Hi, I am new to Statistics. Currently, I am working on a project that involves missing data analysis. I want to know how to quantify bias for...

• Replies: 0
• Views: 1,545
11-17-2013, 11:28 AM
13. ### Interaction terms

Dear all, I would like to hear your thoughts/ideas/comments on this. Brambor et al. (2006) write the following on interaction terms: "The...

• Replies: 0
• Views: 1,545
lbv
03-13-2014, 08:24 AM
14. ### Help with interactions in regression

Hi I would really appreciate if anyone could please help me with this. I am doing a regression analysis, looking at the effect of 2 drugs (A or B)...

• Replies: 3
• Views: 1,545
03-04-2015, 08:19 AM
15. ### Instrumental variable apporach: two stage least squares

Hello everyone, I want to test cross sectional data with a household survey with 60k plus of respondents (however missing data result in overall...

• Replies: 1
• Views: 1,545
01-11-2016, 08:05 PM
16. ### Systematic way of finding all linear relations between given set of variables?

Hello! I'm a newcomer to statistics and data analysis and I'm currently facing a problem which I don't know how to solve. I have a dataset with...

• Replies: 0
• Views: 1,544
04-21-2012, 04:04 AM
17. ### normality transformation and regression

Hi, I have performed 1/sqrtY, and sqrtY transformations on different data sets to achieve normal distribution for simple linear regressions. So...

• Replies: 6
• Views: 1,543
07-04-2014, 03:11 AM
18. ### Newbie in trouble (is regression the right way to go here?)

Hi there! (background, skip if wanted) New member here. Finance student with an exciting area to write a paper about but I have not taken any...

• Replies: 0
• Views: 1,543
04-21-2016, 04:36 AM
19. ### Repeated measures regression

Hi, I have data from an experiment with a continuous dependt variable and two dicotomous independent variable. All measures are repeated within...

• Replies: 0
• Views: 1,542
02-20-2013, 03:43 PM
20. ### External dataset validation of a binary logit model

Hello all, i have developed a prognostic model using binomial logistic regression. Now i want to validate it in an external dataset. The standard...

• Replies: 1
• Views: 1,540
12-27-2014, 08:43 AM
21. ### Log Transform and Nonpositive Values

I know that some researchers, when taking the log of a variable with some nonpositive values (like wealth), simply replace the nonpositive values...

• Replies: 0
• Views: 1,539
04-17-2012, 01:40 PM
22. ### Regression analysis with nominal dependent variable

Hello! In short: I'm having issues with figuring out a technique to measure how well does a categorical variable explain variation among a nominal...

• Replies: 3
• Views: 1,539
12-05-2014, 08:38 AM
23. ### My nemesis: multinomial logistic regression

Dear all, For the final article of my PhD-thesis, I need to analyze various categorical results. My goal is to find whether a certain genotype...

• Replies: 1
• Views: 1,538
09-30-2013, 08:30 AM
24. ### Regression - I'm Stuck! Feedback PLEASE...Thanks!

figured it out now.

• Replies: 0
• Views: 1,537
05-02-2014, 12:11 AM
25. ### Include trend in a Poisson regression

Hey, I'm doing a research about the impact of a co-payment rise policy in the ER. My outcome variable is the number of visits in a week and my...

• Replies: 0
• Views: 1,535
04-23-2013, 06:31 AM
26. ### F test and t-test

Hi guys, I am analyzing some regression results and the p-value for the F-test is large, but at the same time, the t-test for some of the independent...

• Replies: 2
• Views: 1,534
10-15-2012, 09:03 AM
27. ### Regression Using Interaction Terms - PANEL DATA

Good afternoon, I am working with a panel data with more than 2000 observations and only two years. My topic is on "Full Risk Insurance" in...

• Replies: 0
• Views: 1,534
08-29-2014, 01:02 PM
28. ### Can I combine PCA terms with real variables?

Hello, I'm new to this forum. Hopefully I am doing this right! I am trying to do a multiple regression analysis on a data set that has about 250...

• Replies: 0
• Views: 1,533
03-24-2014, 04:47 PM
29. ### Bycatch of dolphins data, zero inflated and under-dispersed - what next?

I am investigating the factors that influence the bycatch of dolphins using a poisson GLM. My response variable is bycatch rate per unit effort and...

• Replies: 2
• Views: 1,533
05-22-2014, 09:46 AM
30. ### Polynomial Regression

Is there anyway to get this formula in the polar opposite where X = Expression? I am hoping to get this so that I can use it to help do a...

• Replies: 0
• Views: 1,532
08-06-2015, 10:42 PM
31. ### Relationship between 2 variables & 1 dependant

Hi all, My wife is busy with an assignment that is even giving me grey hair. She needs to determine the relationships between 2 variables and 1...

• Replies: 7
• Views: 1,531
07-30-2015, 07:45 AM
32. ### using a binary response for a mixed model

Hello, My journey through mixed models (which is documented in past questions) has been an arduous one, however I appreciate being introduced to...

• Replies: 0
• Views: 1,530
03-25-2012, 01:01 PM
33. ### Ordinal logistic regression or linear regression?

Hi Guys, just wondering if I could have your help pls. I have a sample size of 55 patients (of which 22 were subsequently diagnosed with Heart...

• Replies: 0
• Views: 1,530
02-25-2016, 05:14 AM
34. ### Multiple regression analysis - Linearity/homoscedasticity

Hello, I am currently having trouble determining if my predictors show enough linearity to be used in a standard multiple regression analysis, and...

• Replies: 2
• Views: 1,530
05-08-2016, 08:21 PM
35. ### [Mplus] Decreasing iterations changes p value

I'm doing longitudinal regression analysis using mplus, with cross-lagged models. In my analyses, I compare two models: one without constraints (H0),...

• Replies: 0
• Views: 1,529
05-20-2014, 04:29 AM
36. ### Is poisson regression appropriate?

This is more of a general stats question regarding the best procedure to answer my question of interest. I started to address it using poisson...

• Replies: 0
• Views: 1,529
10-10-2014, 02:22 PM
37. ### Help pls! :( OLS firm fixed effects model with time varying and invariant interaction

Dear all, My paper proposal was just declined. Appearantly, I estimated the wrong model and have only 2 days to correct it. I ran ols...

• Replies: 0
• Views: 1,528
08-09-2012, 10:13 AM
38. ### Event Study where event is correlated with index

Hello, I am trying to conduct an event study using the traditional market model: StockReturn = Constant + IndexReturn + DummyVariable + Error ...

• Replies: 3
• Views: 1,528
03-28-2013, 08:54 PM
39. ### Question on interpreting test statistics/regression coefficients

When I run a regression of: logwage = height + dummy variables for each different occupation The coefficients on the dummy variables are all...

• Replies: 3
• Views: 1,528
03-01-2014, 05:18 PM
40. ### Logistic regression p-value significance

Dear all, I have done logistic regression for 20 independent variables for which all of them are categorical (0 and 1) also 1 binomial response...

• Replies: 3
• Views: 1,527
08-07-2014, 02:17 PM
41. ### Minimum number of cases for the reference level

Before I ask this I have the true population so I am not sure this issue even applies :p Is there a minimum number of cases the reference level...

• Replies: 7
• Views: 1,527
04-26-2016, 03:59 PM
42. ### Principal component analysis problem

Hi, My question is about Principal component analysis(PCA). Suppose we have five variables X1,X2,X3,X4 and X5 (all are correlated). We find five PCA...

• Replies: 1
• Views: 1,526
02-25-2013, 02:49 PM
43. ### Which model?

Hi, I'm writing my master thesis and I don't really know which model to use. The response variable is a countvariable: the number of broilers...

• Replies: 7
• Views: 1,525
05-06-2013, 05:51 PM
44. ### Binary Logistic Regression- SPSS Output

Dear TalkStats Forum, I am currently looking into a data-set which measures previous cyber-crime victimization as well as whether the participants...

• Replies: 1
• Views: 1,525
03-03-2015, 03:58 PM
45. ### Number of Observations Question

I am currently completing a research project on a certain type of fund. I would like to conduct a time series. It is my aim to analyse the...

• Replies: 0
• Views: 1,524
02-21-2012, 11:47 AM
46. ### Autocorrelation in nonlinear models

Good morning! I'm running a random effects logit (xtlogit with stata) and cannot find how to test for autocorrelation. Has anyone an idea? Things...

• Replies: 0
• Views: 1,524
09-11-2012, 02:12 AM
47. ### Interaction term in multiple regression with categorical variables

Hello everybody, I have question concerning categorical variables and multiple regression: My Scenario: I have two independent categorical...

• Replies: 0
• Views: 1,523
07-25-2013, 03:26 AM
48. ### Appropriate model for (repeated) data

I have some cross-sectional data, where I'm interested in estimating a relationship between the "number of items in use" in sector i of country j and...

• Replies: 0
• Views: 1,523
08-01-2014, 07:58 PM
49. ### 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: 1,523
11-27-2014, 03:33 PM
50. ### SQReg demonstration

Hello everyone, i need help with this demonstration: SQReg = B1^2*Sxx Someone can help?

• Replies: 1
• Views: 1,523
06-06-2016, 12:22 PM
51. ### Two categorical variables, one continuous dependent variable

Hi, I want to check whether linear regression is the statistical tool I need and ways of checking whether my data is appropriate for this...

• Replies: 3
• Views: 1,522
06-17-2016, 12:23 PM
52. ### statistical robustness analysis in minitab

Hello! I was asked to comment on statistical robustness analysis in minitab, but honestly I don't know much about it. Can anyone help me...

• Replies: 0
• Views: 1,521
11-29-2015, 04:11 PM

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