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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### 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: 6,486
02-17-2008, 02:13 PM
2. ### Multiple logistic regression models

Hi Am I correct in saying that if my results from multiple logistic regression show that the full model does not differ significantly from the...

• Replies: 5
• Views: 3,747
twg
02-20-2008, 09:00 AM
3. ### Regression approach to ANOVA

I am trying to fit regression for some categorical variables. I have two treatment A(3 levels) and B (2 levels) and their interaction. The output...

• Replies: 6
• Views: 4,247
03-07-2008, 04:10 PM
4. ### Multiple Regression Question

Hello, I am examining the association bertween two independent variables and a dependent variable using multiple regression. My dependent variable...

• Replies: 0
• Views: 2,735
03-10-2008, 03:06 PM
5. ### Another question re: correlation and regression

I seem to be getting confused between correlation and regression a bit... I'm trying to identify the relationship between a series of X variables...

• Replies: 3
• Views: 2,486
03-20-2008, 11:38 AM
6. ### 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: 6,290
03-20-2008, 03:09 PM
7. ### Partial R squares

Is there a way to generate partial r-squares (automatically) in multiple regression? Assume a Model Y=X1 X2 X3. GLM produces estimates of R square...

• Replies: 3
• Views: 8,603
03-25-2008, 03:58 PM
8. ### Help Stats :( Interactions and Homoscedasticity

IF anyone could help with this right now would appreciate it so much - have tried looking it up anywhere and finding so many different...

• Replies: 1
• Views: 4,470
03-26-2008, 10:33 AM
9. ### A question about bimodality.

First question - if my Y variable has a bimodal distribution, is it at all possible to run a regression on this variable? Second - if my Y...

• Replies: 1
• Views: 2,154
03-29-2008, 01:24 PM
10. ### Spearmans test...?!

Im conducting a project and it is based on radiographs, basically i look at a radiograph and decide how difficult it is likely to be i have done this...

• Replies: 8
• Views: 2,902
03-29-2008, 01:29 PM
11. ### Help with analysis. PLEASE.

Hi all:wave: , please can any one give an indication of which stats test to use. So far I've looked at doing a bivariate and found significant data,...

• Replies: 7
• Views: 2,668
03-30-2008, 03:28 PM
12. ### Can "infinite" values be used in regression?

Hello, I am analyzing a series of plots along a recovery gradient, using "time since disturbance" as a continuous variable. I want to see how...

• Replies: 4
• Views: 4,248
04-07-2008, 01:50 PM
13. ### Urgent: Linear Regression - Survey Design - Help needed

Hi everyone, For my master thesis, I am trying to prepare a survey on key success factors for virtual worlds. I want to do a linear regression...

• Replies: 5
• Views: 3,662
04-16-2008, 03:28 AM
14. ### Dissertation help with Likert scale

Hello, I'm having some problems with the stats for my dissertation. My dissertation is about the effect of the physical surroundings of a...

• Replies: 9
• Views: 11,535
04-16-2008, 01:27 PM
15. ### Doubt regarding Multiple Regression

Hi, I have some doubt in Multiple regression. I have Y as the dependent variable (mutual fund returns) I have many independent variables...

• Replies: 2
• Views: 3,045
04-24-2008, 01:13 PM
16. ### Regression Analysis

I am looking for a Introductory Regression Analysis book. The extent of my education is Elementary Stats in college, is there more knowledge, of...

• Replies: 1
• Views: 2,519
05-25-2008, 08:59 AM
17. ### Damage Assessment

I apologize for this question being exceedingly vague, but I'm not sure of the correct terminology. After running a regression analysis, I have...

• Replies: 4
• Views: 3,054
05-25-2008, 09:07 AM
18. ### multiple comparisons with multiple regressions?

Hi there, I'm hoping that someone can answer my query or point me in the direction of a reliable source to find out more. My question is - Is the...

• Replies: 3
• Views: 3,365
05-27-2008, 08:36 AM
19. ### Regression analysis - normal distribution and linearity

I am using a scale for a paper. The scores are based on 7 questions with Likert-type responses. I want to use it as a dependent variable in a...

• Replies: 0
• Views: 4,065
05-29-2008, 08:32 AM
20. ### Increasing variance in linear regression

Hi, I have a response and a predictor variable, weight and height, to which I've fitted a linear regression. The relationship appears to be...

• Replies: 6
• Views: 12,605
05-29-2008, 09:33 AM
21. ### Multiple Regression Equation.

Can someone please tell me if this if correct or not. I'm such an idiot. if i have coefficients of : intercept = -17.514 Food =-0.351...

• Replies: 0
• Views: 2,597
el1
05-29-2008, 07:57 PM
22. ### Repeated measures in EEG.

Hello, I am currently working on the analysis of an EEG data set. We measured the EEG signal for 170 verbs and 24 subjects in a picture naming...

• Replies: 0
• Views: 3,895
06-12-2008, 07:07 AM
23. ### multiple regression model

I think 'C' is the answer.. does it look reasonable?

• Replies: 1
• Views: 2,512
06-12-2008, 05:19 PM
24. ### statistics problem

I am stumped on how to go about making the test statistic for this problem. Any help would be appreciated. Thank you. Suppose that you would like...

• Replies: 7
• Views: 4,321
06-12-2008, 05:56 PM
25. ### F-Statistic Question

I'm sorry for probably asking a foolish question, but my searches have yielded very limited results (as well as my reading) in regards to the...

• Replies: 6
• Views: 25,110
06-23-2008, 03:28 PM
26. ### Regression questions

I have answered the questions below can someone please check them to make sure i have them right. I have answered the questions but need to have...

• Replies: 2
• Views: 22,935
06-27-2008, 09:27 AM
27. ### Coefficients and standard deviations

Hi, I have seen in a paper that the author states that the coefficient he gets in a regression implies that an increase of one standard deviation...

• Replies: 2
• Views: 10,916
07-05-2008, 04:58 PM
28. ### Very basic questions on some terms.

I apologize if this is a little too basic for you, but I'm an RN taking statistics ovr the summer and my brain just doesn't work like this. My...

• Replies: 6
• Views: 2,964
07-13-2008, 07:25 PM
29. ### effect size in hierarchical multiple regression (categorical predictor)

Hello all So glad to have found this useful forum and have already gotten some clarity on other issues related to the hierarchical regression...

• Replies: 0
• Views: 4,419
07-30-2008, 01:23 PM
30. ### Meaning of T-Ratio and parameter standard error in HLM analysis

Hello. I've recently used an Hierachical Linear Modeling (HLM aka mixed modeling) analysis method to look at some data. I'm only just beginning to...

• Replies: 2
• Views: 17,430
08-02-2008, 10:34 PM
31. ### Multiple Regression

Hi, I am doing regression for dependent variable Y and independent variables X1, X2, X3 and X4. Y is the weekly stock price of a company which...

• Replies: 4
• Views: 2,610
08-06-2008, 03:39 AM
32. ### consulting help needed (will pay)

In about a month, I will be in need of help on some statistical analyses in the following areas: -categorical data analysis -multiple linear...

• Replies: 1
• Views: 2,649
08-12-2008, 02:41 PM
33. ### Help with Multiple Regression

Hi all, im struggling with what to do with this multiple regression question, any help tips or pointers would be greatly appreciated! Am i...

• Replies: 6
• Views: 3,742
08-16-2008, 12:43 PM
34. ### Check and develop my answers, multiple regression

This is the question, i was wondering if anyone could check if i did the correct thing, and help me develop my written answers if needed. a)...

• Replies: 4
• Views: 6,896
08-17-2008, 12:49 PM
35. ### how to enter certain data, and should i use t test?

Hi all,:wave: I'm new here and need life saving help with my MEd dissertation! I'm studying moral development (SRMS SCORE) and play opportunities...

• Replies: 2
• Views: 5,470
08-18-2008, 04:38 AM
36. ### Centering and transforming

Hello, I'm performing a multiple regression analysis and have a question about transforming variables. I am using two IVs to see if there are...

• Replies: 1
• Views: 3,025
08-28-2008, 05:05 AM
37. ### very basis question

Hi guys, one very basic question: what is the actual difference between simple linear regression and univariate analysis? examples would be...

• Replies: 3
• Views: 3,004
09-01-2008, 08:25 AM
38. ### Number of IV's in multiple regressions: How many is 'too many'?

Hello I need to run a number of individual regressions and am trying to decide how to break them down. I was wondering whether there is a limit...

• Replies: 2
• Views: 4,366
09-02-2008, 03:51 PM
39. ### Prediction Limits

Morning everyone. First thread, so take it easy on me. I am using a holt-winters times series to predict future call and transactional volume. ...

• Replies: 0
• Views: 3,399
09-03-2008, 06:48 AM
40. ### Unstandardized regression coefficient in Multiple Regression Interaction

Hi all, I am trying to interpret a significant cross product interaction in a Multiple Regression and I am getting more and more confused. There...

• Replies: 1
• Views: 9,293
09-06-2008, 01:01 AM
41. ### A quick regression QUESTION

Hi i just have a really simple question regarding multiple regression. i have a independant variable called DPR that is the dividend payout ratio...

• Replies: 2
• Views: 2,782
09-16-2008, 03:10 AM
42. ### Simple CORRELATION query

hi. i am analysing my data using a correlation matrix, and then multiple regression. I have noticed that some of my correlation co-effecients are...

• Replies: 1
• Views: 2,297
09-19-2008, 12:11 PM
43. ### URGENT POOLD OLS regression

ok basically heres the deal. ive used OLS multiple regression on panel data (so ive used a pooled OLS regression.) what i want to know is whats...

• Replies: 0
• Views: 2,037
09-20-2008, 12:25 PM
44. ### brain freeze.....

im having a really stupid moment, but what does it mean when a multiple regression coeffecient is insignificant. say hair colour is found to be...

• Replies: 1
• Views: 2,322
09-22-2008, 09:15 AM
45. ### AM I allowed to do this?

Basically i have a binary variable called DP ( takes values 0 or 1) that i had to drop from my multiple regression due to few observations with of...

• Replies: 1
• Views: 2,267
09-22-2008, 06:06 PM
46. ### 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: 6,299
09-30-2008, 10:27 AM
47. ### Repeated measures - appropriate for my study or not?

Howdy folks - first time poster here. I'm a grad student at CU-Boulder working on grassland ecology and need some assistance. I've got six...

• Replies: 1
• Views: 2,797
10-10-2008, 01:23 AM
48. ### Issues with using composites in linear regression?

Hi, What sort of issues do I need to consider if I include composites as independent variables in a linear regression? (The composites are averages...

• Replies: 0
• Views: 2,389
jts
10-14-2008, 10:05 PM
49. ### Help!

Hi, I'm in the social sciences (psych) using cross sectional data. I'm completing a multiple hierarchical regression looking at interaction...

• Replies: 3
• Views: 2,173
10-16-2008, 07:49 AM
50. ### Standard Deviation or Response / Prediction - Linear Regression

Hi, I'm hoping someone out there can help me with what is probably a very simple question. For a stats assignment, I've created a linear...

• Replies: 4
• Views: 11,484
10-20-2008, 04:47 AM
51. ### Is there any limitation on number of predictors if I run stepwise linear regression

Hi... I need help to solve a problem actually i want to do stepwise linear regression and my predictors are 2279 (differenct combinations of soil...

• Replies: 0
• Views: 2,467
10-21-2008, 02:40 PM
52. ### multiple comparison issue in linear regression

I am puzzled by the following question: If you have a 3-level categorical predictor in a linear regression model, you will get 2 estimated...

• Replies: 0
• Views: 2,941
11-05-2008, 04:41 PM
53. ### Factor analysis with non-normal distribution?

Hi all, Does anyone know an alternative to factor anlysis for non-normal distrbutions which explores factors or clusters on a set of 64...

• Replies: 3
• Views: 16,324
11-06-2008, 02:26 PM
54. ### calculating multiple regression by hand

How would you calculate a regression equation such as Y = b1X1 + b2X2 + b3X3 + a by HAND??? I can find in textbooks the way to calculate two...

• Replies: 1
• Views: 23,408
11-11-2008, 12:04 AM
55. ### Calculations for the unstandardized coefficients for a multiple regression analysis

I am looking to write a spreadsheet of the calculations for the unstandardized coefficients for a multiple regression analysis (the B values). ...

• Replies: 3
• Views: 18,966
11-11-2008, 04:53 AM
56. ### Muliple regression - lets try again

I posted a question earlier (variable transformation) and am wondering if I didn't explain myself very well. Here's a more straighforward and paired...

• Replies: 2
• Views: 2,640
11-13-2008, 07:26 PM
57. ### Two-way ANOVA...or not?

The following data is observed by a building society: No of mortgage applications per month Year 1989 1990 1991 1992 AVERAGE Season...

• Replies: 0
• Views: 2,203
11-16-2008, 06:04 AM
58. ### Help needed with ANOVA analysis

ANOVA df SS MS F Significance F Regression 6 5510.4 918.4 11.67 0.0081 Residual 5 393.2 78.65 Total ...

• Replies: 1
• Views: 5,068
11-18-2008, 03:32 PM
59. ### Independent variables correlate to each other: violation of regression assumoptions?

Ok, so bear with me - total statistical idiot here, in way over his head. I'm running multiple regressions of plant cover against precipitation,...

• Replies: 11
• Views: 13,602
11-19-2008, 10:17 AM

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