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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Weightings Problem

I have been given an EXCEL model and my assigned task is (only) to fix it for problems that I might call "unintended consequences" of the underlying...

• Replies: 4
• Views: 3,085
07-19-2007, 02:33 PM
2. ### Interactions in regression analysis

Is their anyone who knows how to identify interactions between independent variables in a regression analysis? How does one use the output...

• Replies: 5
• Views: 5,206
06-09-2007, 09:42 PM
3. ### Need my answers checked.. Am I right? Fingers crossed : )

Hey everyone, tomororw morning I am doing a statisctics exam but I had a few questions before I go in there. I have been reviewing the slides from...

• Replies: 0
• Views: 2,276
05-15-2007, 06:00 PM
4. ### Regression Analysis Non linear estimation using squares

Hi, I have used Gompertz model to estimate an equation. I have followed these two sites they explain it all. ...

• Replies: 1
• Views: 3,455
04-30-2007, 09:01 PM

1.A study has been conducted to determine whether the mean spending for recreational activities during the month of August differs for residents of...

• Replies: 0
• Views: 3,941
04-23-2007, 12:20 AM
6. ### Ancova

Hello, I'm trying to compare regression models of the same form between three groups. Each model has two continuous independent variables. I need...

• Replies: 0
• Views: 2,290
04-17-2007, 09:23 AM
7. ### Mutliple Regression with a known coefficient

I'm performing multiple regression on a linear model with several independent variables to generate equations such as: W = aX + bY + cZ X = dW +...

• Replies: 1
• Views: 4,179
02-05-2007, 05:27 PM
8. ### Interaction variable in regression

I'm analyzing data from an experiment in which there are two groups of subjects (patients and controls), and in each group the independent variable...

• Replies: 0
• Views: 2,996
01-31-2007, 02:28 PM
9. ### How to develop a regression expression using factor scores?

Hi, I have four factors for fourteen variables. I want to develop a regression expression for a dependent variable using the correlated variables....

• Replies: 1
• Views: 4,292
01-23-2007, 10:05 PM
10. ### Doing logistic regression using epi-info

Hi there! I'd really appreciate help with this one. I'm finding the prevalence of anemia and its determinants. There are about 23 factors that...

• Replies: 0
• Views: 7,005
12-10-2006, 05:01 AM
11. ### dummy coding help for cat variables

I have a questionnaire with 28 items - 20 items are Likert attitude questions. In fact there are 5 main variables (constructs?) being measured by 4...

• Replies: 0
• Views: 4,403
12-06-2006, 07:26 PM
12. ### Help with prediction interval problem

Construct the indicated prediction interval for an individual y. The equation of the regression line for the paired data below is = 3x and the...

• Replies: 0
• Views: 7,889
11-13-2006, 02:50 PM
13. ### Need help selecting statistical test

I am working on my dissertation proposal and have run into a snag in the analyses section. I am trying to analyze data drawn from two time-points. ...

• Replies: 2
• Views: 2,650
09-29-2006, 02:27 PM
14. ### 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: 6,435
09-05-2006, 08:27 PM
15. ### Multiple Regression - Interpreting t-stat

Hi all, If the model fit is satisfactory (ie. R-squared value is sufficiently high), how should the t-stat be interpreted... my reading indicated...

• Replies: 1
• Views: 106,687
08-29-2006, 01:56 PM
16. ### My regression has me confused!

Can someone help me explain this? I did a stepwise multiple regression using the three factors. In Step 3, it shows the Bs in the order I...

• Replies: 2
• Views: 3,847
08-29-2006, 09:22 AM
17. ### Durbin watson

:confused: :confused: i'm in a big big problem? i'm a demonestrator in medical statistics department this week i have to prepare a seminar about...

• Replies: 0
• Views: 4,031
08-27-2006, 03:34 AM
18. ### Linear Regression Equation

Dear friends, I have a set of data as follows: 1....... 58.82±3.23 10....... 62.5±7.90 50....... 87.23±2.33 100....... 110.29±10.33...

• Replies: 5
• Views: 4,405
08-11-2006, 12:24 AM
19. ### regression, pairs of random variables

with observations of an x variable, and a y variable whose expected values lie on a straight line, and whose residual errors are normally...

• Replies: 0
• Views: 3,519
08-06-2006, 12:25 PM
20. ### Plz Help!!!!!!!!!!!!!!!!!!!:(

HEY GUZ CAN U PLZ HELP ME ON THSES @ PROBLEMS< PLZZZ. 1. Please derive solution of parameter estimation for Multiple Linear Regression Model....

• Replies: 0
• Views: 2,691
kal
06-11-2006, 07:41 PM
21. ### Multiple regression least square estimation

Can someone show me the equations and the derivation of the least square estimation of multiple linear regression? It would be even greater if...

• Replies: 0
• Views: 4,039
05-20-2006, 11:44 AM
22. ### 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: 6,513
05-13-2006, 08:43 AM
23. ### Unsure of which test to use!

If I want to assess the effects of a number of different factors such as sex, income etc on exam results which statistical test should I use? I have...

• Replies: 4
• Views: 2,633
05-06-2006, 01:42 PM
24. ### 2SLS - endogeneity issue

I am running a regression on the relationship between aid inflows and investment levels in developing countries. One obvious other explanatory...

• Replies: 1
• Views: 3,635
05-06-2006, 01:40 PM
25. ### 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: 6,287
04-26-2006, 08:00 PM
26. ### Need help with regression statistics analysis

Hello I need serious help. I did my last project fine. I've followed all my instructions for this final project, and did everything, but the part to...

• Replies: 20
• Views: 7,718
04-19-2006, 10:20 PM
27. ### Multiple regression?

Hi, I'm wondering if it is a bad violation to try to conduct a multiple regression analysis if some of the variables are non-parametric? My...

• Replies: 4
• Views: 4,205
04-13-2006, 09:59 AM
28. ### Help with easy stats

Hi guys I desperately need help revising for my STATS module. We have been given practice exam questions but are not given the answers so I can't...

• Replies: 0
• Views: 2,833
04-01-2006, 05:52 PM
29. ### Need help on deciding the analysis tests

Hello every one, I am doing research in social science. i have following issue for which I need advise: 1. My sample is a snowball sample and...

• Replies: 3
• Views: 3,013
03-16-2006, 08:43 AM
30. ### Improving an estimate of a mean value

Hello, I have a dataset that has 10 independent descriptors and one dependent statistic, b. Only a few of the descriptors are quantitative and...

• Replies: 3
• Views: 3,307
02-28-2006, 11:35 PM
31. ### Multiple Regression Question

Hello, I have a question about multiple regression. My project involves non-political group involvement predicting political participation. My...

• Replies: 5
• Views: 4,224
02-21-2006, 08:37 PM
32. ### Multiple regression vs partial correlation

I have another question. I have only 40 patients and 5 domains (or factors) made of 16 (questionnaire) items. In order to get correlation...

• Replies: 1
• Views: 7,036
02-14-2006, 09:27 AM
33. ### Math quiz gone horribly wrong...HELP!!!

I have a math quiz that I did so horrible on that the teacher gave me points for getting my name and the date right out of pity. I was so far off on...

• Replies: 0
• Views: 2,988
02-08-2006, 09:07 AM
34. ### need help with regression problem asap!

I have to do this problem but I have no idea how to interpret the data! Can somebody pleeeeeeeeeease help me?:wave: An object is thrown upward from...

• Replies: 6
• Views: 3,807
12-13-2005, 12:26 PM
35. ### Regression vs ANOVA

How would you determine whether to use ANOVA or multiple regression? What about the data or the situation of a research topic would be the deciding...

• Replies: 1
• Views: 18,522
11-25-2005, 08:41 PM
36. ### Another question about regression

First, thank you to John and Quark for responding to my question about multiple regression!!!! I have another question. I am using SPSS and...

• Replies: 1
• Views: 3,795
11-20-2005, 12:25 PM
37. ### confidence and prediction interval

Let's say I have the following data: y: 19.695 77.310 138.938 16.382 36.249 111.078 9.497 61.270 42.804 52.931 x: 4.0860 8.6203 11.6592 3.6581...

• Replies: 1
• Views: 9,857
10-20-2005, 08:13 AM
38. ### who can help me with multiple regression analysis???

I've calc correlation coefficients between several variables. The results are very promissing, since showing high correlation. The multiple...

• Replies: 1
• Views: 3,479
09-19-2005, 06:44 PM

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