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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Nonlinear regression of non normal asymetric data

Hi! I have a set of data that is dependent on 3 dependent variables. The data is collected over a time period tvice a day. I have a theoretical...

• Replies: 1
• Views: 2,596
09-01-2011, 01:35 PM
2. ### multiple sets of data fitted to one distribution

Hello everyone, I'm new to this board so I hope I'm putting this in the right section. I have multiple sets of data which fit the same...

• Replies: 1
• Views: 2,478
BGM
09-01-2011, 01:34 AM
3. ### Multiple regression analysis: Significant regression model, insignificant predictors

With regards to the title above, my multiple regression model has a significant F value but none of the predictors are significant. All the...

• Replies: 6
• Views: 12,888
08-30-2011, 04:51 PM
4. ### Panel Data Regression using Stata/SPSS

Please I need help. I am trying to run multiple regression analysis using SPSS and Stata but what am getting is not good at all. Can anybody help?...

• Replies: 0
• Views: 4,669
08-30-2011, 05:56 AM
5. ### Appropriate Coding of DV in logistic regression

Good morning! I have the following problem with a logistic regression that relates German graduates' attributes (subject, univerity type, degree,...

• Replies: 2
• Views: 3,564
08-30-2011, 02:43 AM
6. ### Trend data with categorical independent variables

I have 4 time points (future timepoints will be added shortly) measured for each company (about n=150). Each company is associated with one of 20...

• Replies: 0
• Views: 2,113
08-29-2011, 10:37 AM
7. ### homework problem

I have to find a linear model that explains the variable "days to death" based on the other variables. I can't upload the data. If you want to help...

• Replies: 0
• Views: 1,573
08-29-2011, 05:48 AM
8. ### How does correlation work?

Dear All, I am a beginner to statistics. I have a pretty basic question. If I have 2 variables X and Y, how does E produce a no which measures...

• Replies: 2
• Views: 4,375
08-28-2011, 11:03 PM
9. ### Moderated multiple regression and mixed factorial ANOVA

I conducted a moderated multiple regression and a mixed factorial ANOVA on the same variables and got two different results (using moderated multiple...

• Replies: 5
• Views: 7,457
08-27-2011, 03:52 PM
10. ### (easy) Maximum Likelihood Regression question...

hello everyone. i am trying to get my head around a very easy example that i read somewhere explaining maximum likelihood estimation on the OLS...

• Replies: 11
• Views: 4,831
08-27-2011, 02:33 PM
11. ### Multiple Moderated Regression Help!

Hi folks, i need help regarding multiple moderated regresison analysis in SPSS. I have one independent variable (X), one Dependent variable (Y)...

• Replies: 3
• Views: 3,470
08-27-2011, 09:42 AM
12. ### year fixed effects in time series regression

I'm trying to estimate what effect the tariff rate in a specific country has on evasion of tariffs (or rather the underreporting of the value of...

• Replies: 0
• Views: 3,809
08-26-2011, 03:23 AM
13. ### Poisson regression and effects of predictors

Dear all, I just registered this forum too, since I am in doubt what to do! In a study, I want to determine the effects of grazing by animals...

• Replies: 4
• Views: 5,590
08-24-2011, 06:50 AM
14. ### Regression Help for Masters thesis

..........

• Replies: 4
• Views: 6,222
08-24-2011, 12:55 AM
15. ### Relative contribution of variables in logistic regression

Hi, I have been using logistic regression to determine what influences the chances of a person becoming unemployed. A number of variables have all...

• Replies: 5
• Views: 20,361
08-23-2011, 05:18 AM
16. ### Least square estimates

(y1, x1)...(yn, xn) and (w1,x1),.....(wn,xn) are independent oberservations where x1...xn are fixed constants. Suppose we fit the first model yi = a1...

• Replies: 3
• Views: 5,243
BGM
08-22-2011, 11:49 PM
17. ### Multiple Linear Regression Model- Help for Prediction

Hi, I am trying to predict protein solvent accessibility using R, and I need some help. So, I have set of 270 proteins with 76,000 residue. The...

• Replies: 0
• Views: 2,620
08-22-2011, 05:32 PM
18. ### Linear Regression Without intercept ?

hello i m little confuse i want to know that when its is suitable to use regression without intercept ? Any advantage over using linear regression...

• Replies: 10
• Views: 28,720
08-21-2011, 02:34 AM
19. ### Multiple Linear Regression in Environmental Justice Analysis

Hi, I have 982 data points (census block groups) for which I have information on % minority and low income, and levels of air pollution. I did MLR...

• Replies: 3
• Views: 3,140
08-18-2011, 04:50 PM
20. ### interval valued data regression

Hi all, I´m just wondering if there is some way how to handle interval valued data regression? To be more specific I will just briefly describe my...

• Replies: 0
• Views: 1,989
08-16-2011, 03:06 PM
21. ### Research Question Regarding Logistic Regression

Hi all, I am conducting a medical study with n=179 subjects and have something like 30 independent variables that I am comparing to 1 outcome. I...

• Replies: 3
• Views: 2,782
08-16-2011, 12:32 PM
22. ### Help with collinearity

Hi, I have a collinearity problem with my data. How do I deal with this? the variable which has collinearity is important, so I can't remove it from...

• Replies: 3
• Views: 2,431
08-16-2011, 10:40 AM
23. ### Hypothesis

If you got this model: mode 1) y=a +b1x1 + b2x2 + u and this: mode 2) y=a + b1(x1-x2) + u What do you call the restriction there has...

• Replies: 19
• Views: 5,643
08-15-2011, 09:21 AM
24. ### Homework, I Need help please

I got 3 models about the American election: 1) y=a+B1*x1 + B2*x2 + u 2) log(y)=a+B1*x1+B2*x2 + u 3) y=a + B1(x1-x2) + u where:...

• Replies: 1
• Views: 2,247
08-15-2011, 06:30 AM
25. ### Mini job

Hello, are there anyone who are interested in a mini job about regression analysis? Thank you MikkelSoeren

• Replies: 0
• Views: 1,919
08-14-2011, 10:22 AM
26. ### multicolinearity of dummy and numerical variables

Hello, I saw few related messages concerning multicolinearity in this Forum but it did not clared out in my case. So, I have general linear model...

• Replies: 0
• Views: 2,243
08-12-2011, 12:05 PM
27. ### need urgent replies (multiple regression)

I am totally confused with how to explain the outcome of multiple regression.i have to submit a project tommorow.i am a dumb i know but i need help i...

• Replies: 2
• Views: 2,026
08-12-2011, 05:43 AM
28. ### Multiple Experimental Conditions/MANOVA

Hi, I'm new to SPSS and am not sure which tests I need to run to analyze my data. I want to compare product evaluations across 4 experimental...

• Replies: 2
• Views: 2,449
08-10-2011, 03:03 PM
29. ### Ncaaf multiple regression

I want to do a mutiple regression analysis, with one of my independent variables being the number of seniors, juniors, ... On a football team. I...

• Replies: 5
• Views: 2,882
08-10-2011, 12:19 PM
30. ### Multiple Linear Regression problem

Hi Guys, I am breaking my head with a problem, maybe you can help me.... I have a sensor, sensitive to gas. I need to model the response of the...

• Replies: 2
• Views: 1,730
08-09-2011, 03:17 PM
31. ### A new comer has a question about multicollinearty problem

I am running a OLS model with 9 IVs. The model results are good (a fitting model), but I got a high negative multicollinearity problem for two IVs...

• Replies: 3
• Views: 2,411
08-09-2011, 02:51 PM
32. ### Fitting data with Cauchy-noise

Not sure if this is the right board to post this on, but perhaps someone can help me. I've got two sets of data that can be modeled as something...

• Replies: 0
• Views: 1,658
gct
08-09-2011, 10:30 AM
33. ### Regression with replicates? ANCOVA?

Hello, I am confused, I think that the problem is really simple, but somehow cannot get hold of this. First, the simpler question. I have...

• Replies: 0
• Views: 1,755
jw3
08-09-2011, 09:23 AM
34. ### Multiple Interaction terms in Logistic Reg

Alright, it is Monday afternoon and my brain has shut down. It took me ~ 10 minutes just to figure out where to click in order to make this post. ...

• Replies: 1
• Views: 2,345
08-09-2011, 05:19 AM
35. ### Variance of error

With the equation yi = B0 + B1xi + ei Does anyone know what the variance of ei_hat is suppose to equal? So far I have tried to split it the ei...

• Replies: 0
• Views: 3,294
08-08-2011, 01:15 AM
36. ### Sum of Residual equal to zero

I want to know why when you multiply the residual by Y_hat the sum of this new equation is still zero? So in other words I have summation from 1...

• Replies: 4
• Views: 10,302
08-07-2011, 11:17 PM
37. ### Appropriate Statistical Method :: Nonlinear Dynamic System Identification

Hey, I should probably mention beforehand, that I am relatively new to statistics. My problem is the following: I am doing nonlinear dynamic...

• Replies: 0
• Views: 1,603
08-06-2011, 08:31 AM
38. ### Analytical linear regression?

My lecturer stated that no method exists to determine the line of best fit for a set of data analytically. He went on to state that computers through...

• Replies: 6
• Views: 5,279
08-05-2011, 06:01 PM
39. ### which model to use?

I have a dependent variable that is limited and discrete (it goes from -9 to 9 in whole numbers), yet the residuals produced from a linear regression...

• Replies: 10
• Views: 3,249
08-03-2011, 01:34 PM
40. ### Checking MI data residuals

Hello, I was wondering, what is the best ways to check the residuals of a multiple linear regression on multiply imputed data? Is it a case...

• Replies: 0
• Views: 1,617
08-02-2011, 10:02 AM
41. ### multiple linear regression on MI data

Hello, I have just ran a stepwise multiple linear regression on multiply imputed data. I have R2, F and P values for the MLRs carried out on...

• Replies: 0
• Views: 1,443
08-02-2011, 09:50 AM
42. ### warning - may require help

Hello all you stats, and indeed non-stats, fowk I'm reasonably au fait with my stats methods. However, I don't have access to SPSS, which is my...

• Replies: 1
• Views: 1,771
08-01-2011, 03:48 AM
43. ### Multiple Regression: Dependent Variable has sub-categories

I want to be able to predict Total Spare Part Costs (Y). There are 2 types of spare parts contributing to the total costs. Let Spare Part 1 = SP1...

• Replies: 4
• Views: 4,180
07-31-2011, 06:07 PM
44. ### Entering control variables

I'm looking for some help on if it's possible to enter aggregate level controls into individual level analyses. For example, if I'm looking at the...

• Replies: 2
• Views: 2,640
07-31-2011, 04:49 AM
45. ### how to get the standard error of this formula?

Hello. I am stuck in solving following 3 and 4 questions. What is the difference between constant term and intercept term? I cannot get the...

• Replies: 0
• Views: 1,853
07-30-2011, 11:24 AM
46. ### The DV is binary, and two IVs are times series data, how to do regression?

Hi guys, please help!!!! I want to do regression on a data having such fields: Loan_number Date default_nextmonth Unemployment_rate ...

• Replies: 1
• Views: 2,056
07-29-2011, 09:34 PM
47. ### deviance

can anybody please tell me why we need to multiply difference of likelyhoods by "-2"? Where this 2 came from, why not 3? Could not find answer

• Replies: 3
• Views: 2,175
07-29-2011, 11:24 AM
48. ### Can I do this?

Hey everyone :) I was wondering if I could do this. I have a dependent variable that is age. N = 228. Each participant answered a question which I...

• Replies: 0
• Views: 1,653
07-28-2011, 08:32 AM
49. ### Std deviation of correlation coefficient?

Hi I've run a VAR model to find the correlation coefficient between two stock markets. Now I need to find the standard deviation of this...

• Replies: 1
• Views: 2,954
07-27-2011, 07:29 PM
50. ### using utilities of different attribute levels (from conjoint analysis) in regression?

In short, I am trying to measure factors influencing an intention-to-purchase a product, with use of a regression. However, some of my constructs...

• Replies: 1
• Views: 2,385
07-27-2011, 05:29 PM
51. ### pearson correlation with linear regression scenario please!

I was wondering if anyone could give me an example of a pearson correlation with linear regression scenario?

• Replies: 1
• Views: 2,944
07-27-2011, 05:22 PM
52. ### Power-law relation (Help Please)

Hi there, I wonder if you can kindly help me with questions below 1) I have data to apply for a power-law relation (A=B*C^D). I am using excel to...

• Replies: 3
• Views: 2,211
07-26-2011, 09:28 PM
53. ### including population as control when dependent variable is defined as per-capita?

Hi all, So I have a model where the dv is per-capita spending and I wonder whether it would be appropriate to include population as a control...

• Replies: 0
• Views: 1,834
07-26-2011, 08:25 PM
54. ### Multiple linear regression on rank transformed data - good way to deal with outliers?

Hi, I am looking to see if a number of different environmental factors could affect production of a metabolite. I ran a stepwise multiple...

• Replies: 0
• Views: 2,833
07-26-2011, 02:16 PM
55. ### Linear mixed models vs conditional likelihood

Hey guys, Thought I'd share something interesting that I came across yesterday with another biostatistician. See what you guys think. ...

• Replies: 0
• Views: 1,706
07-26-2011, 10:33 AM

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