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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Percentage/proportion prediction interval

Hi, anyone could help with this: we know that with a considerably large sample we can estimate what is the proportion of cases having a certain...

• Replies: 1
• Views: 2,759
02-09-2009, 01:00 PM
2. ### Comparing regression equations

I am thinking of trying to use the logit model to determine the probability of whether patients will participate in a particular health program. My...

• Replies: 2
• Views: 2,871
02-08-2009, 11:31 AM
3. ### Linear Regression Models

I am being asksed if an equation is linear in the paramenters or variables and I am a bit lost. I understand that for something to be linear it cant...

• Replies: 1
• Views: 2,052
02-01-2009, 10:04 AM
4. ### Risk Model Re-Weighting Help Needed

Long story somewhat short … My company uses a risk model with 10+ variables. Each of these variables is weighted according to the risk it...

• Replies: 2
• Views: 1,962
Axl
01-28-2009, 03:13 PM
5. ### "Best" Multiple (Multivariate) Nonlinear Regression?

Hi all, I'm just getting started in R. I've had good luck finding the right (predictive) correlation weights using orthogonal polynomials in Java....

• Replies: 2
• Views: 3,280
Axl
01-22-2009, 03:05 PM
6. ### Stats analysis help would be very much appreciated

I have carried out some research. The research involved respondents filling in a questionnaire of 62 questions. Answers were on a scale - Strongly...

• Replies: 4
• Views: 2,425
01-20-2009, 06:33 AM
7. ### Logistic regression or DFA?

Hi! I am trying to get my masters thesis done. I am taking a statistics course right now, but I need to get started on things sooner rather than...

• Replies: 3
• Views: 4,785
01-15-2009, 08:43 AM
8. ### Unbalanced Sample Sizes

Given two variables: one is a single estimate measured on one individual, the other is comprised of multiple samples taken from the same individuals...

• Replies: 0
• Views: 2,312
01-12-2009, 05:06 PM
9. ### Statistical Significance

I am completing a statistics project having been given data for 30 years. I have calculated the pairwise correlation coefficients between Infant...

• Replies: 2
• Views: 2,474
01-04-2009, 03:42 PM
10. ### multiple regression analysis on likertscale

Dear All, I am doing the analysis of my data obtained through a questionaire. i want to find the relationship of different forms justice...

• Replies: 1
• Views: 1,821
12-24-2008, 07:46 AM
11. ### Linear regression

Hi all I was given a data sample of 35 countries which included the country name,the number of railways and the number of airports in the given...

• Replies: 6
• Views: 2,551
12-23-2008, 06:09 PM
12. ### Multiple logistic Regression Power Analysis

Hi to everybody, Please does anybody can help me to solve this problem? I have a multiple logistic regression model with more than one BINARY...

• Replies: 1
• Views: 3,951
12-22-2008, 09:04 AM
13. ### Hlm?

I am working with a large data set, n = 1200+ average course grades culled from over 15,000 students from a school. I ran a regression using average...

• Replies: 9
• Views: 4,058
12-17-2008, 12:21 PM
14. ### Binary Logistic Regression in R

Warning: this is going to be a long post. Acknowledgement: Thanks to The Ecologist for getting me started on what I hope is the right road. This...

• Replies: 24
• Views: 20,405
12-16-2008, 03:21 AM
15. ### adjusting a proportion score (controling for age)

I have 20 yes/no ratings (did this product help you). People were able to rate as many of the 20 products as they used (on average people rated 5...

• Replies: 8
• Views: 3,577
12-15-2008, 11:23 PM

Hello, I was wondering if you could please offer any advice as I appear to have got rather muddled. I am writing a resesarch proposal, and I...

• Replies: 8
• Views: 2,432
12-10-2008, 11:14 PM
17. ### Can you guys check these for me

Shade answers to T/F questions and type letter answer to multiple choice questions next to problem number. Chapters 13 & 14 included. T F 1. If a...

• Replies: 1
• Views: 4,425
12-08-2008, 03:33 PM
18. ### Multiple Regression & Multiple Linear Regression: 2 Qu's

I know these are 2 very basic question, but if someone could please confirm them for me I'd be very grateful indeed: 1. Am I correct in thinking...

• Replies: 4
• Views: 10,897
12-05-2008, 03:40 PM
19. ### price determination prediction

Its been 2 years since my last statistics class. I did fairly well but the material isn't so fresh since I haven't had to use it. I am writting a...

• Replies: 1
• Views: 1,719
12-01-2008, 03:14 AM
20. ### Did i get theese right i am confused, can anyone help me please

25. In multiple regression analysis, residual analysis is used to test the requirement that A) the variation in the residuals is the same for all...

• Replies: 2
• Views: 20,332
11-30-2008, 09:08 PM
21. ### Testing for difference 2 regression models

Hello, I am working on multiple regressions at the moment and have come to a point that I need a little assistance. I have the following question:...

• Replies: 8
• Views: 23,991
11-29-2008, 11:29 AM
22. ### Looking for mult. linear regression equations

Hi - I'm having trouble finding the equations for the coefficients for a multiple linear regression with two independent variables (a=, b1=, b2=). ...

• Replies: 1
• Views: 2,228
11-26-2008, 08:13 PM
23. ### Multiple Regression with Multiple Groups

Hello, I am looking at predictor variables (scores on partner perception measures) on a criterion variable (relationship satisfaction), in order to...

• Replies: 9
• Views: 4,623
11-26-2008, 06:58 PM
24. ### 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: 12,640
11-19-2008, 10:17 AM
25. ### 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: 3,876
11-18-2008, 03:32 PM
26. ### 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: 1,597
11-16-2008, 06:04 AM
27. ### 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: 2,067
11-13-2008, 07:26 PM
28. ### 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: 16,839
11-11-2008, 04:53 AM
29. ### 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: 19,908
11-11-2008, 12:04 AM
30. ### 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: 14,282
11-06-2008, 02:26 PM
31. ### 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: 2,348
11-05-2008, 04:41 PM
32. ### 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: 1,719
10-21-2008, 02:40 PM
33. ### 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: 10,176
10-20-2008, 04:47 AM
34. ### 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: 1,678
10-16-2008, 07:49 AM
35. ### 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: 1,701
jts
10-14-2008, 10:05 PM
36. ### 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: 2,189
10-10-2008, 01:23 AM
37. ### 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: 5,396
09-30-2008, 10:27 AM
38. ### 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: 1,738
09-22-2008, 06:06 PM
39. ### 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: 1,715
09-22-2008, 09:15 AM
40. ### 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: 1,669
09-20-2008, 12:25 PM
41. ### 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: 1,916
09-19-2008, 12:11 PM
42. ### 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: 1,977
09-16-2008, 03:10 AM
43. ### 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: 8,135
09-06-2008, 01:01 AM
44. ### 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: 2,220
09-03-2008, 06:48 AM
45. ### 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: 3,284
09-02-2008, 03:51 PM
46. ### 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: 2,295
09-01-2008, 08:25 AM
47. ### 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: 2,246
08-28-2008, 05:05 AM
48. ### 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: 3,984
08-18-2008, 04:38 AM
49. ### 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: 5,017
08-17-2008, 12:49 PM
50. ### 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: 2,834
08-16-2008, 12:43 PM
51. ### 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: 1,965
08-12-2008, 02:41 PM
52. ### 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: 2,004
08-06-2008, 03:39 AM
53. ### 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: 15,848
08-02-2008, 10:34 PM
54. ### 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: 3,730
07-30-2008, 01:23 PM
55. ### 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: 2,403
07-13-2008, 07:25 PM
56. ### 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: 8,535
07-05-2008, 04:58 PM
57. ### 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: 21,431
06-27-2008, 09:27 AM
58. ### 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: 23,560
06-23-2008, 03:28 PM
59. ### 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: 3,122
06-12-2008, 05:56 PM

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