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Dason ‎(Devorador de queso)
05-10-2017
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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. 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: 1,500
08-07-2014, 02:17 PM
2. Comparing regression slopes measured two times withinsubjets?

Although I am not a statistics-newbee, I have no clue how to contrast the following situation against null-hypothesis, i.e. I don't know how to do...

• Replies: 3
• Views: 1,224
08-08-2014, 12:33 AM
3. Interpretation of restricted cubic splines' coefficients

Hi all, I was wondering whether there is a "not-very-obscure" interpretation of the coefficients (in a regression analysis, like logistic...

• Replies: 0
• Views: 2,636
08-08-2014, 04:05 AM
4. Reasons for high lambda in ridge regression?

I've seen a few papers where they use k-fold cross-validation (k=10) to find the optimal lambda. They end up with huge amounts such as 4000. This is...

• Replies: 0
• Views: 1,588
08-08-2014, 01:23 PM
5. cooks distance cutoff

Hello, I urgently need to find out what is happening in regards to below: I am doing a huge number of simple linear regressions. For each...

• Replies: 9
• Views: 10,306
08-08-2014, 10:18 PM
6. How to estimate quasi-elasticities from marginal effects of logistic regression?

HI everyone, I am new to this forum. I need some help regarding logistic regression analysis. I am using logistic regression for my research. I...

• Replies: 0
• Views: 1,255
08-09-2014, 07:11 AM
7. Multiple Linear Regression: Coeffiecients are all insignificant - Can someone help?

Hi together, I carried out a multiple linear Regression (OLS) and the results show me that all my explanatory variables (business model...

• Replies: 1
• Views: 1,143
08-09-2014, 11:18 AM
8. Moderation Analysis through Process by Andrew Hayes and SPSS regression analysis

Hello all, I need help analyzing some data for a moderation analysis. I have a continuous variable (predictor), Exhaustion, a continuous outcome,...

• Replies: 0
• Views: 3,182
08-09-2014, 10:22 PM
9. Consequences of wrongly applying dummy variables?

I was just wondering if there were any consequences to applying dummy variables to independent variables which don't need it. For example, let's...

• Replies: 0
• Views: 1,187
08-10-2014, 06:58 AM
10. Standard Error of Estimate

I am reading a book called Applied Statistics with Excel by G. Keller. On p593 he wrote Standard Error of Estimate=(SSE/n-k-1)^2, and SSE = sum...

• Replies: 7
• Views: 1,974
08-10-2014, 08:42 AM
11. What is a "count" in regression

It is often said that you should use Poisson regression with data that involves counts. But it seems to me that most of data in the social science is...

• Replies: 9
• Views: 2,473
08-11-2014, 08:51 PM
12. Moderated regression - how to create the graph for some (not all) variables.

I've run into a problem and I was hoping someone could help me out. My research question is whether beliefs about controllability of weight...

• Replies: 0
• Views: 1,163
08-12-2014, 05:13 AM
13. 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: 1,331
08-12-2014, 10:38 AM
14. Cox proportional hazard

I am trying to understand how to interpret the change in the hazard function for a one unit change in a dummy predictor. I know for a continuous...

• Replies: 3
• Views: 1,671
08-12-2014, 01:00 PM
15. Robustness check of univariate results

Hi all I calculated several univariate regressions with different explanatory variables. Some are significant, while others aren't. Some show the...

• Replies: 0
• Views: 1,705
08-12-2014, 04:13 PM
16. Plot for multiple regression

Hi All, I have a very basic question. When I run a regression to predict Y from X, I basically draw a scatterplot in excel. I am wondering how...

• Replies: 9
• Views: 2,831
08-12-2014, 06:03 PM
17. Moderator regression: plotting graphs from multiple product terms

This is my first time posting, so apologies if I don't make sense. I've conducted a hierarchical regression analysis. I have multiple IVs whereby...

• Replies: 0
• Views: 941
08-13-2014, 10:57 AM
18. Problem/question regarding Cox Regression

Hello! I am new to statistics and research and am looking for a little help. I am doing a study looking at the the effects of post-operative...

• Replies: 1
• Views: 1,126
08-13-2014, 08:39 PM
19. Interpretation CATREG interaction coefficient

Hi everybody. I have done an Catreg analyses on my data and have included interaction variables (for example nutrient * sex). However sex is...

• Replies: 2
• Views: 1,458
08-14-2014, 01:48 AM
20. When to use partial bivariate correlation and when to use multiple linear regression?

Let's say I have X and Y and wonder how strongly they correlate, but am suspecting that Z is a confounder. What research question would lead me...

• Replies: 1
• Views: 1,043
08-14-2014, 08:23 AM
21. Help: Bootstrap Regression (or not)

I am an ecologist with enough statistics background to know I am confused. The trophic magnification factor (TMF) is a commonly used measure to...

• Replies: 0
• Views: 1,062
08-14-2014, 10:36 AM
22. Generalised Linear Model - with negative skewed DV

Hi All, I am trying to fit a generalised linear model to which the dependant variable is negatively skewed. The DV ranges from 0 to 150 with 45%...

• Replies: 0
• Views: 2,159
08-14-2014, 10:52 PM
23. The absolute dependence in panel data

Hello, I want to ask something related to the panel data analysis. In traditional regression and correlation analysis, it is clear that if the...

• Replies: 1
• Views: 1,188
08-15-2014, 01:39 AM
24. Multiple Linear Regression Problem

Hi, I want to do a multiple regression analysis. I have one Y which are numeric values (sample number = 85) and the following Xs. Sr...

• Replies: 1
• Views: 899
08-18-2014, 01:13 AM
25. linear specification vs. logarithmic specification

Dear all When I do a box-cox test to evaluate whether to use a logarithmic transformation for my dependent variable (which are IRRs, and the...

• Replies: 2
• Views: 1,191
08-18-2014, 07:48 AM
26. Linear regression with an interaction variable

I have a linear regression model: Dependent variable = α + independent variable 1 (continuous variable) + independent variable 2 (categorical) +...

• Replies: 0
• Views: 1,308
08-18-2014, 10:30 AM
27. Multivariate Regression when Independent Variables could have Dependencies

First post, have looked and could not find this question elsewhere. Struggling with this so hopefully someone can help. I am trying to predict the...

• Replies: 0
• Views: 861
08-18-2014, 11:08 AM
28. mixed predicator types for building logistic regression model

There has a data set, some predicator variables are of categorical types, such as X1={A, B,C}; X2={1, 2, 3}; and other predicator variables are of...

• Replies: 0
• Views: 954
08-18-2014, 02:22 PM
29. Regression confusion

I am looking at relationship between GHQ12 and treatment. Just wondering is it suitable to do regression analysis on this? But which would be my...

• Replies: 3
• Views: 2,053
08-20-2014, 01:52 PM
30. Are there model specification tests for Two Stage Least Squares (2SLS)?

Question. Are there model specification tests for Two Stage Least Squares (2SLS)? I am trying to estimate the parameters (B1, B2, B3) of the...

• Replies: 0
• Views: 1,322
08-21-2014, 01:23 AM
31. Strong Predictor

Hi guys! I have a question... I'm trying to fit 4 predictors to regress on abdominal fat. Multicollinearity was checked for, and all the other...

• Replies: 3
• Views: 1,826
08-22-2014, 02:27 AM
32. Adding dummy variables let significance of coefficients disappear

Hi all I have a regression with two variables x1 and x2, both are significant. When I add a dummy variable D (which is significant), one of the...

• Replies: 3
• Views: 2,318
08-22-2014, 07:14 AM
33. Beta NO Intercept purpose

Hey guys, What would a Beta with NO intercept tell me about a time series model?

• Replies: 0
• Views: 1,186
08-23-2014, 06:19 AM
34. Which approach to use? Repeated measures with a covariate

Hi, I hope that someone can give me a pointer please. I am trying to determine which is the most appropriate test to apply to my data. I have...

• Replies: 0
• Views: 976
08-24-2014, 07:44 AM
35. Statistical Analysis help for thesis - Correlation, Probit, Tobit and Moderation

Hello Talkstats users! I am writing here cause I need some guidance on my statistical analysis which has turned out far too complex for my...

• Replies: 0
• Views: 1,288
08-25-2014, 05:42 AM
36. Regression where IV/predictor is a proportion, bounded by 0 and 1

Hi, I know that if the outcome variable is a proportion, I'd need to run a beta regression, but can anyone advise on running a regression where...

• Replies: 0
• Views: 1,283
08-25-2014, 07:32 AM
37. Comparing 2 best fit lines for 2 halves of a data set

I have a data set with ~200 coordinates plotted on a scatter plot. I can either use the data set as is, or split this plot into two data sets along a...

• Replies: 0
• Views: 975
08-25-2014, 06:13 PM
38. Linear or non-linear regression model

Hi, I have 20 independent variables and 1 dependent. I've used the stepwise method to determined what predictors are more significant compared to...

• Replies: 1
• Views: 1,410
08-26-2014, 12:31 AM
39. Non-parametric regression

I am relatively new to this so excuse my ignorance. As best I can tell non-parametric regression has no coefficients (no slopes). It does have...

• Replies: 8
• Views: 1,771
08-26-2014, 10:25 AM
40. Pasimonious Model for Neural Networks forecasting, I am really confusing.

Hello People I recently studied Neural Networks forecasting and some interesting question arose while I am reading various articles on the net. ...

• Replies: 0
• Views: 1,153
08-27-2014, 06:56 PM
41. Mixed Model Regression in SPSS

Hello, I have a random group of participants that answered questions on a survey regarding their general opinions on specific health activities....

• Replies: 0
• Views: 1,259
08-28-2014, 07:58 AM
42. 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: 1,504
08-29-2014, 01:02 PM
43. Confused: Mixed model, step-wise regression, testing for random effects

Dear all, I want to perform a MLR (mixed model) on a data set (details below) that has both numeric and categorical explanatory variables. The...

• Replies: 0
• Views: 1,239
08-30-2014, 04:53 AM
44. Can the PCA scores be used as variables in multiple linear regression

Hello, I used PCA to reduce the dimensions of a data set of 10 variables into 2 principal components (describing 82% of variance in data set of 10...

• Replies: 6
• Views: 1,893
08-31-2014, 04:04 AM
45. Supervised learning on sporting events (Data prep)

I'm playing around with the prediction of sporting events, my data looks something like this. A single row for each team and the stats. Team ...

• Replies: 2
• Views: 1,274
09-02-2014, 01:42 AM
46. Simple Linear Regression with Transformed Variables

I ran a simple linear regression (length of stay predicts cost). I natural log transformed both the dependent and independent variables. I am...

• Replies: 3
• Views: 2,287
09-03-2014, 05:49 AM
47. compare beta subgroup from total group - two dummy variables

My plain regression looks as follows: tendaystockreturn = alpha + beta * dummy variable that takes a value of 1 in case a director purchases...

• Replies: 1
• Views: 2,107
09-04-2014, 01:47 PM
48. Poisson regression

Hello, im analyzing an article for my studies with the hypothesis if a change in work motivation ist related with a change in mental well being...

• Replies: 0
• Views: 1,556
09-08-2014, 10:06 AM
49. 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: 2,149
09-08-2014, 02:16 PM
50. Interpretation of interaction variables

Hi everyone I have two datasets A and B with mutually exclusive observations and I run two identical regressions (x = y) for A and B each...

• Replies: 0
• Views: 1,435
09-08-2014, 11:20 PM
51. Probability distribution of a prediction

Hi all, I'm a newbie here so apologies if I missed a similar thread. Looked for it, but couldn't find it. Let's say I've estimated a linear model...

• Replies: 0
• Views: 1,084
09-09-2014, 08:28 AM
52. Correlation for different level of volatility

Hi, I need to estimate correlation between 2 variables across quantiles of volatility (volatility is an independent variable).. I want to show how...

• Replies: 0
• Views: 1,382
09-09-2014, 11:37 AM

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