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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Lag Length for Breusch Godfrey with Cross Sectional data

Hey guys, I am working on my master thesis and I use STATA. I have cross-sectional data with not really a time component. However I ordered my...

• Replies: 6
• Views: 6,548
03-04-2014, 01:53 PM
2. ### Regression analysis with independant variable (error) and multiple dependant variable

So I took a lot of data (~10000) on a machine (3D printer). For each reading, I got the error and a lot of different parameter (speed, voltage,...

• Replies: 26
• Views: 6,547
11-21-2014, 08:24 AM
3. ### Do I need to treat all variables in the same way when I transform values?

Hi, I want to carry out a Pearsons correlation to look relationships between methane flux from soil under different plantation treatments (i.e...

• Replies: 3
• Views: 6,477
02-17-2008, 02:13 PM
4. ### multiple regression- how to calculate b?

If I'm given the means, standard deviations, and correlation coefficients of two independent variables and one dependent variable, how do I calculate...

• Replies: 1
• Views: 6,453
02-23-2010, 10:03 PM
5. ### Comparison of non-linear regressions from two different samples

Hi at all! I got a big problem during my data analysis and I’m already looking for a solution a few days. I hope somebody here can help me. I...

• Replies: 1
• Views: 6,444
07-19-2011, 08:13 PM
6. ### bonferroni correction in multivariate regression

• Replies: 27
• Views: 6,421
12-01-2014, 06:34 PM
7. ### Percentage change of dependent variable (MLR)

Greetings, I went through SPSS regression analysis of a certain dataset, tested assumptions, and finally I got a multiple regression model:...

• Replies: 3
• Views: 6,369
12-21-2015, 03:34 PM
8. ### Multiple Regression and SEM

This is largely a theory question. I have been unhappy with my professor's attempt to answer this question for me so I want to get others' opinions....

• Replies: 2
• Views: 6,364
12-05-2010, 08:11 PM
9. ### Logistic regression vs multiple regression

I have a 3 predictor variables that I am using to predict participation rates. How do I determine whether to use logistic regression or multiple...

• Replies: 1
• Views: 6,347
07-15-2009, 07:54 PM
10. ### Heteroscedasticity in logistic regression

Hi! I have a question regarding heteroscedasticity in binary logistic regression, and would be most grateful for any kind of feedback. I am...

• Replies: 0
• Views: 6,339
08-20-2010, 08:48 AM
11. ### Panel Data Regression (xtreg) STATA

Hello everyone, I'm running a pooled tiem series regression with random effects. It runs fine and I'm having a problem interpreting results. I'm a...

• Replies: 0
• Views: 6,339
09-15-2011, 09:24 PM
12. ### confidence interval/f-tests

Basically Fe (iron) is the x variable/predictor, and MDD loss is the y variable/response in minitab. 1. I generated some data (regressoin...

• Replies: 1
• Views: 6,335
02-23-2011, 01:01 PM
13. ### Model evaluation in logistic regression

I am doing the analysis in very recent forms of SAS (if any use that here). I ran a logistic model with a huge number of data points (some 11,000)....

• Replies: 6
• Views: 6,320
12-02-2011, 04:14 PM
14. ### Calculating deviance residuals and dispersion for a count model

Hello, I’m working with a poisson model to look at relationships between fish and habitat. I have multiple-pass count data (the same pool...

• Replies: 2
• Views: 6,293
10-02-2012, 07:42 PM
15. ### Testing suppression with SEM

hey everybody Using multiple regression analysis on my data, I've discovered a suppression effect. Now I started analyzing the same data with...

• Replies: 1
• Views: 6,292
09-30-2008, 10:27 AM
16. ### Single Negative Beta in Multiple Linear Regression

Hi everyone I'm having trouble interpreting a single negative regression coefficient in a multiple linear regression. The situation is as follows:...

• Replies: 1
• Views: 6,282
04-05-2012, 03:57 AM
17. ### Dummy Variables and Multiple Regression

Hi, if someone could make this clear for me, would be much appreciated.. Is it possible to create a dummy variable for more than one outcome. ...

• Replies: 3
• Views: 6,279
03-20-2008, 03:09 PM
18. ### Help Regarding Linear Regression in SPSS (R Square help)

Hi, this is my situation for a Human Resources research project. I have 100 respondents and 14 questions. All the questions are simple tick...

• Replies: 3
• Views: 6,268
05-12-2011, 12:58 PM
19. ### Standard error of regression

I am writing a robust regression algorith in Python and using the linregress method from SciPy/NumPy. linregress returns the b0, b1, r^2, p_val, and...

• Replies: 2
• Views: 6,255
09-16-2010, 02:35 PM
20. ### Logarithmic regression in SPSS

Hi, does anyone know how to use non-linear logarithmic regression in SPSS? I have one DV and one IV. Thanks

• Replies: 0
• Views: 6,248
06-27-2011, 10:39 AM
21. ### Pooling data for multiple regression

Hi All, :wave: I have a few issues with some collected data. I have been collecting attitude/perception questionaires using likert scales...

• Replies: 2
• Views: 6,218
05-13-2006, 08:43 AM
22. ### Multiple regression help needed

I am struggling with the concept of a forced entry linear multiple data regression. Could someone please explain what they are, why they are used,...

• Replies: 1
• Views: 6,213
09-05-2006, 08:27 PM
23. ### Regression Help for Masters thesis

..........

• Replies: 4
• Views: 6,207
08-24-2011, 12:55 AM
24. ### Using pooled OLS when running a model with panel data?

How bad is it to use pooled OLS instead of fixed effects when you have 7 years of panel data? From what I have understood, the risk is that the...

• Replies: 1
• Views: 6,204
07-12-2014, 06:46 AM
25. ### The best formula to use in excel to forecast daily call volume?

I have used single and double exponential smoothing, but did not know if there is a more accurate approach to predict how many calls that can be...

• Replies: 4
• Views: 6,204
10-01-2015, 01:46 PM
26. ### Difference-in-differences analysis - STATA syntax for binary data

Dear Friends, I am doing Difference-in-differences analysis with repeated cross-sectional data. I have both continuous and binary data. I found...

• Replies: 0
• Views: 6,198
05-24-2012, 03:50 AM
27. ### How to report a non-significant regression?

Hi guys, For my final year research project, I have a few regression models with non-significant results. I was just wondering what the...

• Replies: 4
• Views: 6,198
03-29-2016, 03:45 AM
28. ### Vote Fraud in Iowa??? Tell me how this is statistically possible please!

NOTE: UPDATED, PLEASE SEE MY COMMENT #26 ON PAGE TWO. Ok... Please be easy on me... One, I'm new here. Two, it has been a long time...

• Replies: 27
• Views: 6,194
10-08-2012, 01:53 PM
29. ### Variance Extracted and Multicollinearity in Structural Equation Model

Hello, I am a new user here, and I am quite in need of help with regards to statistical problems. :) I really appreciate it if anyone can help me. ...

• Replies: 0
• Views: 6,165
01-20-2012, 12:56 PM
30. ### calculating sample size needed by future studies having got my Logistic Regression

Help anyone? I have downloaded Gpower 3, and seemingly found the option: under test family: z tests statistical test: logistic regression ...

• Replies: 11
• Views: 6,161
07-23-2012, 08:59 AM
31. ### Lmer Output/: variable re-levelling

Morning/Evening all I'm having a bit of a time getting the LME4 package to list ALL of my IVs, rather than all-1. By way of example, here is my...

• Replies: 7
• Views: 6,143
09-06-2011, 06:56 AM
32. ### HELP NEEDED! Running a negative binomial regression in SPSS

Hey everyone, I'm new here, working on my master's thesis in strategic public relations, and am in over my head with statistics. I need to run a...

• Replies: 1
• Views: 6,143
02-03-2013, 11:49 PM
33. ### Method to calculate the most accurate method of prediction

Hi, this is my first post, and I'm entirely self taught re statistics, so go easy on me. :) I want to calculate which of several prediction...

• Replies: 1
• Views: 6,138
10-12-2010, 01:04 PM
34. ### Fixed Effects Common Panel Regression versus GMM estimation

Hi, I have estimated my model using the Fixed Effects Common Panel method and this seems to work fine. I get an R2 of .90 However, I am now in...

• Replies: 0
• Views: 6,133
02-18-2011, 07:43 AM

okay the regression formula that i have worked out is y=12559.7477 + 4265.7566X i have to discuss the size, sign, significance and meaning of this. I...

• Replies: 1
• Views: 6,114
03-27-2011, 08:49 PM
36. ### Panel Data Analysis, Help Urgently Needed! Fixed & Random effects, Fama MacBeth etc.

Hi, I have the following panel dataset: 11 years of annual data with a total of 250 observations. The panel is highly unbalanced, in the beginning...

• Replies: 0
• Views: 6,114
11-29-2011, 04:34 PM
37. ### Linear regression on seemingly linear data, but residual plot is a parabola?

So I did a linear regression on x y data that seemed very linear, but the residual plot was a a clear parabola. Next I did a 2nd order polynomial...

• Replies: 2
• Views: 6,082
11-27-2011, 05:56 AM
38. ### Fixed term is “(Intercept)” --Dredge function

Hi, i'm currently running a glm model in R and have attempted to use the following code: Model:...

• Replies: 2
• Views: 6,075
02-05-2015, 11:08 PM
39. ### The standardized and non standardized coefficients gives diff results

Hi. Some coworkers ran a regression and used first the beta to analyze the strength of the independent variables in a regression. However all the...

• Replies: 7
• Views: 6,067
03-09-2012, 05:21 PM
40. ### Conducting a White's test in SPSS

PLEASE anyone?? I'm really struggling here... Hi everyone, I've seen a tutorial on youtube on how to conduct a white's test in spss. I was...

• Replies: 1
• Views: 6,065
07-10-2015, 05:44 AM
41. ### How can this be true [linear versus logistic regression]

This comes from a government study that was used to generate something of great importance, funding and related factors for a major government...

• Replies: 17
• Views: 6,050
01-15-2017, 02:51 PM
42. ### Zero-inflated continuous independent variables

Are there ways of handling zero-inflated continuous independent variables?

• Replies: 4
• Views: 6,038
11-01-2012, 10:44 AM
43. ### Best way to normalize a non linear trend.

Using a regression performed in Excel, I have data that can be described by the equation y = 4*(x^0.5). The x values range from 1000 to 5000. I...

• Replies: 2
• Views: 6,032
06-20-2011, 11:48 PM
44. ### 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: 6,028
01-03-2014, 04:32 PM
45. ### MLR: R2 and RMSE in assessing quality

How would one judge the quality of a multiple linear regression model if the model had a high value for cross-validated R2 but also a high value for...

• Replies: 1
• Views: 6,000
04-26-2006, 08:00 PM
46. ### Collinearity

Hi, Is there any possibility that if colinearity exists between two or more DV variables in a regression analysis, the regression analysis to be...

• Replies: 3
• Views: 5,985
01-17-2011, 08:00 AM
47. ### 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: 5,980
12-06-2013, 05:40 PM
48. ### Is R squared number valid when forcing a slope on regression fit line?

When I plot my log transformed data and do a regression fit, I get a slope of 3.37 and a r-squared of 0.96. My professor wants me to "force" a slope...

• Replies: 12
• Views: 5,978
02-16-2012, 02:06 PM
49. ### Multiple Regression analysis for dependent variable with multiple dimensions..

Hi All, with respect to Multiple Regression Analysis, is it possible to regress 6 dependent variable dimensions against 1 independent variable? ...

• Replies: 2
• Views: 5,969
06-16-2010, 01:56 PM
50. ### What does the correlation matrix for a multiple regression analysis contain?

hi :wave: how do u doing? I have this quiz tomorrow and I need answer for one quistion If any one of u guys knew the answer u just type it ...

• Replies: 1
• Views: 5,968
05-27-2011, 12:34 PM
51. ### Interpreting log-linear coefficients

Hi there, I am fairly new to regression and have been set the task of modelling a data set in the form ln(y) = bx1 +bx2 +bx3 +bx4 +bx5 + e. In...

• Replies: 3
• Views: 5,960
06-22-2012, 04:19 AM
52. ### multiple regression - mix of ordinal/continuous/dichotomous independent variables?

I need to find relationships between one continuous dependent variable (hourly salary) and a number of ordinal (e.g. language skills which are ranked...

• Replies: 0
• Views: 5,947
03-08-2010, 03:52 AM
53. ### Pros and cons of using partial least square regression

Hello guys, I have a computational model of a single cardiac cell. With it I have generated a data matrix consisting of columns of inputs (e.g....

• Replies: 0
• Views: 5,940
08-18-2010, 12:05 AM
54. ### Multiple Regression Analysis of a time series

Hello everyone! I'm trying to use multiple regression analysis of a time series, but I've run into a problem interpreting the data. First, I've...

• Replies: 0
• Views: 5,936
02-04-2008, 05:48 PM
55. ### Double check sample calculation from pilot study

I am really a neophyte to statistics but am in the middle of a research project and would appreciate someone checking my calculations. I ran a...

• Replies: 3
• Views: 5,928
03-01-2009, 09:28 PM
56. ### Regression using gram-schmidt orthogonalization

Hello dear members, Hoping again to solicit some help from the knowledgeable members here, I thought I'd come to you with this question. I'm...

• Replies: 7
• Views: 5,914
12-07-2010, 11:31 PM

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