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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### What tests can I use?

Basically, I have to variables Carbon Monoxide (CO) and Black Smoke. I have to test whether black smoke influences the level of CO in the...

• Replies: 1
• Views: 1,189
01-07-2014, 06:02 PM
2. ### Blinder-Oaxaca decomposition- T-stats and Group Indicator Variable

Hi everyone, I'm currently doing some pooled blinder oaxaca decompositions on ethnic discrimination using the UK LFS data and have two questions....

• Replies: 0
• Views: 1,143
01-07-2014, 08:54 AM
3. ### Negative Binomial Reg - why changes in significance using one less/similar variables?

Hi, I am running a NBR on a sample of 500 participants to predict survival rate from a set of health indices eg. diagnosed diabetic, history of...

• Replies: 0
• Views: 955
01-07-2014, 06:46 AM
4. ### what t value is usually the threshold for significance?

i have an exercise asking me to estimate the t values of the coefficients of my regression and then state if they significant or not. but he does not...

• Replies: 4
• Views: 5,050
01-05-2014, 12:36 AM
5. ### Comparing Regression Slopes Across 3 Groups - SPSS

I am running a simple regression with one dependent variable and one independent variable but splitting the results by group (3 groups). So, I am...

• Replies: 4
• Views: 2,989
01-04-2014, 05:47 PM
6. ### can you help me interpret this?

Vitamin D varies with season, below is a method of de-seasonalising vit D from literature. I'm not too sure what they've done after regressing the...

• Replies: 4
• Views: 1,698
01-04-2014, 10:50 AM
7. ### Using country dummy variables?

Hi, Short introduction I`m currently researching whether institutional factors have an effect on Earnings management (dependent var.). Not sure...

• Replies: 0
• Views: 2,668
01-04-2014, 10:18 AM
8. ### Logistic regression with significant coefficient but .000 Exp(B)

I am getting an output for a binary logistic regression I can't quite figure out how to interpret. It is a 0/1 binary logit, with 10 numeric IVs....

• Replies: 9
• Views: 6,036
01-03-2014, 04:32 PM
9. ### Spatial Econometrics - Bias?

Dear all, I seem to be lost with the following problem in spatial econometrics: Assume the true model is a spatial error model (SEM). It is...

• Replies: 0
• Views: 2,222
01-03-2014, 06:18 AM
10. ### Questions about HLM 2-Way Interactions calculation

Hi all, I am using HLM 2-Way Interactions calculator to yield simple slopes:). w1 was the moderator in level 1 while x1 was the predictor in...

• Replies: 0
• Views: 2,080
01-02-2014, 10:46 PM
11. ### Distribution of Residual Sum of Squares

We know that the residual sum of squares (RSS) has a  sigma^2 * Chi Square (n-p degrees of freedom) So if I want to simulate many...

• Replies: 3
• Views: 3,465
01-02-2014, 09:07 PM
12. ### Interaction effect in a DID analysis

Hi, I had a little argument with my thesis advisor, who said that I couldn't operate with the coefficients of my model without doing a "likelihood...

• Replies: 1
• Views: 1,443
01-02-2014, 05:26 PM
13. ### Can I use group mean centered variables in an OLS regression?

Hi everyone, I have a question about some analyses I'm working through. I originally ran the model as an HLM because of the nested structure of my...

• Replies: 0
• Views: 1,835
01-02-2014, 03:41 PM
14. ### Summarizing hierarchical multiple regression (moderation) tables into One - APA?

I have performed a series of 18 hierarchical multiple regression analyses to test for moderation effect. One dependent variable, two independent...

• Replies: 0
• Views: 2,848
01-01-2014, 01:58 PM
15. ### determine / eliminate influence of confounding variable on 10 data series

Any help with the problem below would be greatly appreciated. I have very little knowledge of statistics. I am using excel. I have measured...

• Replies: 1
• Views: 967
12-31-2013, 02:45 PM
16. ### Univariate Logistic Regression - how to performe

Hello, I wonder how to perform Univariate Logistic Regression analysis in SPSS. Tested variables are dichotomized and predictors are ordinal and...

• Replies: 14
• Views: 15,830
12-29-2013, 02:19 PM
17. ### Derivation of t-test for regression coefficient

Hello, at the moment I am researching, if the t-statistic is appropriate for a significance test of the regression coefficient on a dummy...

• Replies: 4
• Views: 2,296
12-28-2013, 12:36 PM
18. ### Correlation with control group

Hi! Sorry if this is a very basic question. If you have two groups: diseased and control. Both groups undergoes an intervention giving you two...

• Replies: 2
• Views: 1,910
12-28-2013, 10:20 AM
19. ### probit vs biprobit

Its probably just a simple understanding question. Say i have two endogenous binary variables y1 and y2 and I think they are somehow correlated....

• Replies: 0
• Views: 1,310
12-24-2013, 10:54 AM
20. ### parameter estimate of categorical variable

I run multiple regression with 2 continuous and 1 categorical variable (3 levels). SAS will hold the last level of the categorical variable and will...

• Replies: 10
• Views: 2,768
12-23-2013, 10:48 PM
21. ### Interaction term in the logistic regression model

I hypothesize that smoking status increases risk of heart attack but this effect is modified by the level of a certain hormone. There is no...

• Replies: 3
• Views: 2,272
12-23-2013, 04:02 PM
22. ### Need help for regression

For liner regression model with two independent variables. Is there any way to calculate SSE by given SSX1 SSX2 SST and r12?

• Replies: 0
• Views: 1,431
12-22-2013, 12:50 AM
23. ### Estimation - the best factor?

I need your help if you can. I get some measurement results. If everything work correct results keep close to nominal value: If the...

• Replies: 0
• Views: 1,805
12-20-2013, 02:40 PM
24. ### significant variable within a non-significant model/block in hierarchical regression

Greetings. I'm conducting a hierarchical (aka sequential) regression analysis with four blocks of variables. Block 1 consists of 5 covariates. Sex...

• Replies: 0
• Views: 2,188
12-20-2013, 02:04 PM
25. ### Linear Mixed Model, Fixed effects

Hi, I have a panel data of 40 countries and two 5-year averages observations. I'm trying to investigate the effect of foreign direct investment on...

• Replies: 0
• Views: 961
12-20-2013, 10:08 AM
26. ### Math interpretation of linear regression through the origin and related estimates

Hello all, while group-doing some basic linear regression I've stumbled upon a puzzling matter. Given a set of points in the form (x_i, y_i), I...

• Replies: 4
• Views: 1,927
12-20-2013, 09:08 AM
27. ### Confidence interval of a delta-Rsquare

Hello all, ¿Does someone know if there is any way to obtain the confidence interval (or the SE) of a delta-Rsquare when fitting a latent variable...

• Replies: 0
• Views: 1,246
12-20-2013, 06:06 AM
28. ### Stratified sampling for regression analysis

Hello guys! I’m struggling to define the sample of a statistical study of judicial decisions, and need your help to solve some doubts. I have...

• Replies: 3
• Views: 2,281
12-19-2013, 11:24 AM
29. ### Treatment effect on samples with pre-existing difference

I have two samples. One has received the treatment, the other has not. N for the treatment sample is 400. N for the non-treatment sample is 1200. ...

• Replies: 2
• Views: 1,361
12-18-2013, 07:20 PM
30. ### ARIMA Modelling

I'm performing some ARIMA modelling on time series data for UK energy consumption for my dissertation at university. At a bit of a loss though. So...

• Replies: 10
• Views: 2,487
12-17-2013, 09:47 AM
31. ### Regression coefficient- need help!!

Suppose that we have regressed the log of household median income on the Gini coefficient and obtained the following result. Standard errors are...

• Replies: 1
• Views: 2,065
12-16-2013, 11:12 AM
32. ### logistic regression and test for confounding (urgent)

Hi, Im using SPSS to examine a relationship between A and B, and test for confounder C I wrote the whole question but for some reason when I...

• Replies: 0
• Views: 1,697
12-15-2013, 10:02 PM
33. ### Logistic regression, weighting, and variance estimation

Hi; I have logistic regression models based on Pew survey data (predicting self-reported turnout), and I could use some help on identifying the...

• Replies: 0
• Views: 1,043
12-14-2013, 04:03 PM
34. ### Interpretation of Marginal effects in Tobit model

hi ,,,, i have estimated censored regression model and also estimated the marginal effects after log transformation of dependent variable. guide...

• Replies: 0
• Views: 2,957
12-14-2013, 10:27 AM
35. ### poisson regression (Offset or not)

Here is the problem and my question: A group of 250 pediatric patients with hydrocephalus who had received a ventriculoperitoneal shunt (VP) was...

• Replies: 0
• Views: 1,595
12-13-2013, 05:39 PM
36. ### Call Center Prediction Model

I have an interesting task to determine the best model for forecasting the number of calls coming into our call center each hour of the day. One...

• Replies: 8
• Views: 2,626
12-13-2013, 10:02 AM
37. ### Importance of Normality Assumption for Hypothesis testing methods

Hello everyone! Can someone please share their thoughts on the following question with me. Methods of hypothesis testing usually has a...

• Replies: 1
• Views: 1,801
12-13-2013, 09:15 AM
38. ### Principal Component Regression - Interpretation

Hi, I am having some doubts about the interpretation of my research. I've conducted a Principal component analysis and used those components as...

• Replies: 0
• Views: 1,702
han
12-13-2013, 06:33 AM
39. ### Confidence Interval With Regressed Logarithms

I have converted 80 ("Count") pairs of X and Y to L10(X) and L10(Y) and performed a regression analysis. Assuming a valid correlation, I know I can...

• Replies: 0
• Views: 1,163
12-12-2013, 05:27 PM
40. ### semi parametric

kindly guide me about the commands of seater model for semi parametric in R software:)

• Replies: 0
• Views: 1,931
12-12-2013, 10:07 AM
41. ### Multivariate timeseries regression - use of a dummy variable between two time periods

Dear stat people I am doing an analysis on how the relation between Y and three explanatory variables change from one time period to the next. I...

• Replies: 0
• Views: 1,350
12-11-2013, 01:11 PM
42. ### Probit regression with sparse data - Should i standardize data or ??

I am trying to create a probit model (later other models like logit, cloglog and weirder stuff will be tried feel free to make suggestions!), the...

• Replies: 0
• Views: 1,315
12-11-2013, 10:37 AM
43. ### Fitting 3 mixed-effects models with different outcome variables

Hi all The overarching dependent variable in my study is mental processing. Since this is a hard-to-grasp construct, I've used three measurements...

• Replies: 0
• Views: 1,411
12-11-2013, 06:57 AM
44. ### Percentages regression

I need to do a regression analysis as part of my dissertation and am quite lost. What I want to do is to see if there is a correlation between a...

• Replies: 2
• Views: 2,213
12-11-2013, 04:06 AM
45. ### Interpreting White test for heteroskedasticity

Hello, i am using Gretl software and run a OLS regression on a set of panel data. I am trying to find out if there is hetereskedasticity in the...

• Replies: 1
• Views: 22,776
12-10-2013, 06:49 PM
46. ### Bayesian approach for logistic regression models? (the case of low-count cells)

so... now that i'm a PhD student my advisor wants me to help out people with their projects. as fate may have it, the same problem has arisen both in...

• Replies: 15
• Views: 5,468
12-10-2013, 01:54 PM
47. ### 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: 1,687
12-10-2013, 01:03 PM
48. ### Model checking and generalized multilinear regression

Dear all, In my research I am analyzing the quality of game player softwares by making them play multiple times against a certain opponent and...

• Replies: 0
• Views: 1,979
12-10-2013, 01:31 AM
49. ### Price endogeneity

Hi experts, I am trying to make a demand model for hotel rooms using OLS regression. I got booking data for my hotel for 4 years and have the...

• Replies: 2
• Views: 1,467
12-09-2013, 01:08 PM
50. ### Interpreting the regression coefficient for the change in a logged variable

Dear TalkStats members, I need help interpreting a coefficient in a regression model I have encountered. The model looks as follows and is...

• Replies: 0
• Views: 1,390
12-07-2013, 02:34 PM
51. ### Inverse prediction from Binary Logistic Regression

Hi! I was wondering how to get the inverse prediction from Binary Logistic Regression, that is calculating x (and CIs) given p. Now, I know that x...

• Replies: 3
• Views: 6,012
12-06-2013, 05:40 PM
52. ### Regressing regression coefficients against other sets of data

Hi guys A bit of a background. I am a trader by profession and have moderate knowledge of stats. I am building a model which prices a futures...

• Replies: 2
• Views: 1,938
12-06-2013, 12:58 PM
53. ### Is it possible to convert cross sectional data to panel data

Hi All, I am relatively new to stata. Is it possible to convert cross sectional (survey) data to panel data with Stata? Thanks in advance

• Replies: 0
• Views: 1,331
12-05-2013, 11:26 PM
54. ### I need regression help

I don't need anyone to do my work for me. But I am totally confused. I've read my andy field chapter. My mind is boggled. I'm struggling on how...

• Replies: 1
• Views: 1,478
12-05-2013, 05:13 PM
55. ### Fixed effects regression and regression towards the mean

Hi, i use linear fixed effects models to analyze panel data. The dependent variable is a sum score for mental health. Independent variable are...

• Replies: 2
• Views: 1,446
12-05-2013, 05:15 AM
56. ### Linear Regression and Linear Algebra

It's been years since my (intro) linear algebra course, so I'm unsure of this. If I perform a multiple linear regression that included indicator...

• Replies: 2
• Views: 1,721
12-04-2013, 10:34 PM

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