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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### 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: 3,032
01-04-2014, 05:47 PM
2. ### How to use LASSO with common shocks

I am trying to use LASSO for variable selection, on a balanced panel. I have a total of 14 predictors, and would like to reduce this variable space....

• Replies: 4
• Views: 1,561
08-27-2013, 10:50 AM
3. ### Need help with regression analysis

Hi everyone, I am kinda confused with regression analysis. My research is to investigate the degree and trend women in the construction industry...

• Replies: 4
• Views: 1,714
09-06-2013, 10:13 AM
4. ### Large part of population sampled with logistic regression

Hi all, Back from a hiatus with a question. I'm doing an analysis on survey data on commuting to work. We're interested in the factors that...

• Replies: 4
• Views: 1,419
10-16-2013, 09:20 PM
5. ### Reading Binary Logistic Regression results

Hi! Need some help on Binary Logistic Regression results interpretation. 1) On Block 0: Begining Block i have overall percentage of 76%, but...

• Replies: 4
• Views: 3,393
09-13-2013, 08:10 PM
6. ### unstandardised coeffcients value over 1.0?

Hello all First post from somebody who uses stats for work but not a statistician Dumb question perhaps, but if my multiple regression...

• Replies: 4
• Views: 1,488
10-07-2013, 10:55 AM
7. ### Can logistic regression give opposite results than univariate analyses?

Dear anyone I am studying the risk for taking drug X. My study population includes >500 people. I have a list of variables (gender, age…)...

• Replies: 4
• Views: 2,751
10-11-2013, 03:25 AM
8. ### Stationarity in regression

This is much a time series question as a regression one, but I work a lot with regression using time series data these days. I am running regression...

• Replies: 4
• Views: 3,815
10-10-2013, 12:09 PM
9. ### Adjust for which confounders

Hello! I have done a logistic regression to compare pregnancy rates amongst various ordinal categories of a specific blood hormone measurement....

• Replies: 4
• Views: 2,602
10-23-2013, 10:58 AM
10. ### Logistic regression probabilities

Hi I have built a logistic regression model that predicts the response probability from a marketing campaign. The model ranks correctly (i.e. the...

• Replies: 4
• Views: 1,595
10-23-2013, 07:57 AM
11. ### Interpretaing the coefficients of polynomial regression and multiple regression.

How do i interpret the coefficients of the 2nd degree polynomial regression model: (crop yield)=1.22+2.1(Nitrogen doses)+3.1(Nitrogen doses)^2 ...

• Replies: 4
• Views: 1,421
10-12-2013, 08:00 AM
12. ### Multiple Linear Regression and likelihood Ratio Test

Hi All, I have completed multiple regressions with one model including an interaction term, and the other not including the interaction term. ...

• Replies: 4
• Views: 5,681
11-06-2013, 09:22 PM
13. ### Goodness of fit for Mixed effects Logistic Regression

Dear all, I am trying to assess the goodness of fit of random effects Logistic regression. a) I would have used a Hosmer-Lemeshow test, but how...

• Replies: 4
• Views: 6,018
12-02-2013, 09:52 PM
14. ### Newbie question about direction of bias

Lets say you have a regression With only one regressor, subjected to omitted variable bias. Will the direction of bias only depend on the direction...

• Replies: 4
• Views: 2,772
12-04-2013, 06:48 PM
15. ### 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: 5,080
01-05-2014, 12:36 AM
16. ### 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: 1,707
01-04-2014, 10:50 AM
17. ### regression transformation problems

I am currently writing a dissertation on the causes of regional unemployment. My dependent variable is unemployment rate (%). I plan to carry out...

• Replies: 4
• Views: 1,213
01-12-2014, 10:54 AM
18. ### 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: 1,933
12-20-2013, 09:08 AM
19. ### 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: 2,306
12-28-2013, 12:36 PM
20. ### What Regression Analysis Should I Employ

Hi, I would really appreciate some help with this. I am looking to see if employees' organisational history (such as voluntary/involuntary turnover)...

• Replies: 4
• Views: 1,397
01-25-2014, 05:17 AM
21. ### Addressing unequal error variance

AKA heteroskedacity Other than logging (when that works) and WLS, which I commonly lack the information or intelligence to use, what is the...

• Replies: 4
• Views: 1,157
02-04-2014, 01:36 PM
22. ### How to derive the r squared of an interaction term within a model

Hi there, I am using Hayes' (2013) PROCESS macro to run a simple moderation, and I have the R-sq for the entire model. (M moderates the...

• Replies: 4
• Views: 3,412
03-03-2014, 03:18 PM
23. ### Predicted probabilities from logistic regression

Hi, I have carried out logistic regression in STATA to adjust for several patient characteristic variables that are thought to affect my outcome....

• Replies: 4
• Views: 2,544
03-17-2014, 04:51 AM
24. ### [SOLVED] model coefficients

I need a little help with the output of this model. Below is the output of a linear model of log river flow over time: ...

• Replies: 4
• Views: 1,520
04-03-2014, 10:27 PM
25. ### Problems with time series model

Hello. I want to run a pretty simple ADL model, and I have a couple of problems: My model: - Consumption (Ct) as the dependent variable -...

• Replies: 4
• Views: 1,658
04-14-2014, 12:01 PM
26. ### Getting values larger than 1 for a logit test?

I have run a logit test on a binary dependent variable "gambled?" against "Age" in STATA. I have the dependent variable coded as 0 for no and 1 for...

• Replies: 4
• Views: 1,367
04-08-2014, 02:02 PM
27. ### Estimate the coefficients of an equation system - can I use OLS?

Hi! I have not worked so much with this type of regressions and have tried to find the answer in my econometric books and on internet, but have...

• Replies: 4
• Views: 1,680
04-24-2014, 04:18 PM
28. ### [age] discrete variable or continuous variable in linear regression?

Hi i need some help. I hope you can guide me. I have a survey and i need to predict the variable e18. The issue is i'm not sure how to treat the...

• Replies: 4
• Views: 3,168
04-24-2014, 12:51 PM
29. ### Characteristics that define simple linear regression?

Can someone please tell me which three characteristics define simple linear regression? Thank you in advance.

• Replies: 4
• Views: 2,305
05-05-2014, 10:44 AM
30. ### Categorical data tested for several factors: which test should I use?

Hi guys, I'm currently doing a research project as part of my internship on mangrove damage along a river as a consequence of a major flood...

• Replies: 4
• Views: 1,407
05-14-2014, 11:53 AM
31. ### compare regression effects nested models

Dear forum, The following problem is puzzling me for a while. Suppose I have two nested models, where y is the same dependent variable and x1 is...

• Replies: 4
• Views: 1,860
05-29-2014, 12:50 PM
32. ### How to interpret control variabele in logistic regression with interactions

Hi guys, Im doing this in binary logistic regression using SPSS. So I have some main effects in a first block: the independent variabeles :...

• Replies: 4
• Views: 1,761
05-23-2014, 12:01 AM
33. ### Mixing lasso with OLS

Hi, I am looking at a data set of 45 continuous IV and 1 DV, trying to find an acceptable regression model. I tried the lasso with cross-validation...

• Replies: 4
• Views: 3,251
06-06-2014, 02:50 PM
34. ### Mediation in a Piecemeal Growth Curve Model

tl;dr version: In a piecemeal growth curve model test of mediation in a RCT can I calculate the indirect effect via (a: piecemeal:treatment -->...

• Replies: 4
• Views: 1,518
06-04-2014, 04:56 PM
35. ### Multiple Linear Regression

I was given an assignment to fill in the blanks (shown as ?s here) for a multiple linear regression problem. I can get MS error and SS error easily....

• Replies: 4
• Views: 1,369
06-22-2014, 03:04 PM
36. ### Reverted coefficient

Dear all, I really hope somebody can help me out here. I have a problem concerning the outcome of my hierarchical multiple regression model. I...

• Replies: 4
• Views: 1,310
07-15-2014, 01:39 PM
37. ### Logistic regression significant test

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: 4
• Views: 1,291
07-16-2014, 04:50 PM
38. ### Help a newbie with multiple statistical regression.

I want to run a multiple stastical regression in SPSS, trying to correlate different biomarkers with a brain region (hippocampus), at the same...

• Replies: 4
• Views: 1,725
07-10-2014, 07:28 AM
39. ### What I can conclude if the CI of different regression models are not overlapping?

I asked to build a graph of the means and confidence intervals of β1 values from 4 regression models and conclude about their statistical...

• Replies: 4
• Views: 1,431
07-12-2014, 11:33 AM
40. ### cox regression

I am new to this method, so I started this thread for questions on it. :p Some discussions of Cox treat it as a counting process and others do...

• Replies: 4
• Views: 2,187
09-08-2014, 02:16 PM
41. ### Coefficient of determination interpretation

Hey guys, this my first post in here so hello everyone:) I have a question regarding the coefficient of determination. Wikipedia says: An...

• Replies: 4
• Views: 2,085
09-17-2014, 04:58 PM
42. ### what is correlation???!!!!

what is the meaning of correlation??????????

• Replies: 4
• Views: 1,787
12-14-2014, 11:56 AM
43. ### Binary IV and ordinal DV, suggestions for a model?

Hi guys! Just started at a new company having graduated this year, theyve got me analysing data and producing some key driver analytics. Thing is,...

• Replies: 4
• Views: 2,791
10-01-2014, 03:57 AM
44. ### Linear Regression

• Replies: 4
• Views: 1,863
09-25-2014, 04:28 PM
45. ### Calculating AUC for just one binary variable legitimate?

Dear members of talkstats, I am a junior Radiology resident in France and I have an urgent question about my study. I am checking the capability...

• Replies: 4
• Views: 1,392
11-08-2014, 08:06 AM
46. ### Forecasting with fewer data points

Hi, Can someone provide more insights on how we can achieve forecasting with fewer data points and come up with more accurate models. I have...

• Replies: 4
• Views: 2,432
10-29-2014, 08:46 AM
47. ### Interaction/Moderation Question

So I know that the terms interaction and moderation are used pretty much interchangeably. However, is it possible for variables to interact without...

• Replies: 4
• Views: 1,973
11-16-2014, 08:42 AM
48. ### Generate model from known independent & dependent variables. Does this make sense?

I am on a new job as a statistician, after studying stats some years ago. So please bear with me as I seek a solution to my problem. I'm trying...

• Replies: 4
• Views: 2,425
12-15-2014, 05:56 PM
49. ### Measurement error

An econometrician I am reading notes that if the IV are measured with error the least square estimators are biased towards zero. I assume, I doubt...

• Replies: 4
• Views: 954
12-30-2014, 02:34 PM
50. ### Appropriate Regression Method?

Hi guys, I'm relatively new to statistics, and I'm searching for an answer as to which regression method would be most appropriate for the problem...

• Replies: 4
• Views: 2,006
01-07-2015, 06:39 PM
51. ### Binary Logistic Regression and Generalised Linear Model

I have basic understanding of statistics and am trying to interpret the output of a generalised linear model. The data used in my analyses...

• Replies: 4
• Views: 1,586
jle
01-22-2015, 09:43 PM
52. ### Force a regression coefficient to be negative

I have a regression problem using variable X to predict Y. That is, Y = c + A*X + error. For the regression problem, we need that A must be...

• Replies: 4
• Views: 2,189
04-09-2015, 08:10 PM
53. ### Estimation with negative coefficients

Hi, I have probably an easy problem, however I'm not really sure how to do it: Basically, I would like to estimate a linear regression with OLS. So...

• Replies: 4
• Views: 1,304
04-25-2015, 09:57 AM

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