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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### 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: 3,474
09-19-2005, 06:44 PM
2. ### 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: 9,847
10-20-2005, 08:13 AM
3. ### 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: 3,789
11-20-2005, 12:25 PM
4. ### 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: 18,496
11-25-2005, 08:41 PM
5. ### 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: 3,800
12-13-2005, 12:26 PM
6. ### 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: 2,972
02-08-2006, 09:07 AM
7. ### 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: 7,021
02-14-2006, 09:27 AM
8. ### 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: 4,216
02-21-2006, 08:37 PM
9. ### 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: 3,298
02-28-2006, 11:35 PM
10. ### 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: 3,005
03-16-2006, 08:43 AM
11. ### 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: 2,830
04-01-2006, 05:52 PM
12. ### 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: 4,198
04-13-2006, 09:59 AM
13. ### 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: 7,702
04-19-2006, 10:20 PM
14. ### 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: 6,271
04-26-2006, 08:00 PM
15. ### 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: 3,632
05-06-2006, 01:40 PM
16. ### 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: 2,624
05-06-2006, 01:42 PM
17. ### 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: 6,496
05-13-2006, 08:43 AM
18. ### 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: 4,018
05-20-2006, 11:44 AM
19. ### 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: 2,686
kal
06-11-2006, 07:41 PM
20. ### 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: 3,503
08-06-2006, 12:25 PM
21. ### 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: 4,370
08-11-2006, 12:24 AM
22. ### 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: 4,020
08-27-2006, 03:34 AM
23. ### 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: 3,830
08-29-2006, 09:22 AM
24. ### 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: 106,554
08-29-2006, 01:56 PM
25. ### 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: 6,420
09-05-2006, 08:27 PM
26. ### 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: 2,641
09-29-2006, 02:27 PM
27. ### 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: 7,860
11-13-2006, 02:50 PM
28. ### 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: 4,390
12-06-2006, 07:26 PM
29. ### 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: 6,990
12-10-2006, 05:01 AM
30. ### 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: 4,286
01-23-2007, 10:05 PM
31. ### 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: 2,991
01-31-2007, 02:28 PM
32. ### 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: 4,167
02-05-2007, 05:27 PM
33. ### 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: 2,284
04-17-2007, 09:23 AM

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: 3,917
04-23-2007, 12:20 AM
35. ### 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: 3,446
04-30-2007, 09:01 PM
36. ### 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: 2,272
05-15-2007, 06:00 PM
37. ### 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: 5,192
06-09-2007, 09:42 PM
38. ### 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: 3,083
07-19-2007, 02:33 PM
39. ### generalized least squares

Hello. How can I modify least square linear regression method in order to fit a straight line to data with non gaussian error (such as Levy, Poisson...

• Replies: 6
• Views: 4,312
08-02-2007, 05:53 AM
40. ### Multicollinearity

Hello at everyone, I'm new at the site, and I'd appreciate your suggestions. I have a multiple -through the origin- regression model. Working with...

• Replies: 2
• Views: 7,051
08-24-2007, 06:49 PM
41. ### Significance Issue in Regression

Hi everyone! I have a statistical question that I hope someone can answer. I am doing a research about relationship between satisfaction and...

• Replies: 9
• Views: 4,016
08-29-2007, 03:17 PM
42. ### More than 1 squared term in a regression equation?

If I have a multiple regression model in which there are more than 1 or 2 terms that are non-linear with the dependent variable Y, then what can I do...

• Replies: 0
• Views: 2,994
10-19-2007, 11:34 AM
43. ### Regression and metric space

Hi, I have two independent variables X and Y and one dependent variable Z. X alone explains 45 percent of the variation in Z (Rsquare) and Y...

• Replies: 0
• Views: 3,731
10-29-2007, 03:40 PM
44. ### Regression Analysis Assignment

:confused: hi all! I'm new here but I sort of need some help. I have this regression analysis assignment to do using SPSS and stats knowledge...

• Replies: 0
• Views: 5,411
11-05-2007, 09:44 AM
45. ### Regression & Predictions

I have a problem to work out involving forecasting/predicting: Given multiple data sets (variables), I need to evaluate which set is the best...

• Replies: 1
• Views: 3,083
11-26-2007, 04:10 AM
46. ### Cluster Analysis

Hi all, I have a small sample of 75 participants. I'm conducting an exploratory study looking at psychological distress and gender role...

• Replies: 0
• Views: 2,966
11-29-2007, 11:26 AM
47. ### Need your help with AIC and model selection

Hello. If someone could help me with this problem, I would really appreciate it!! I am working on multiple Mantel tests (like multiple regression)....

• Replies: 1
• Views: 3,093
12-06-2007, 02:14 PM
48. ### Combining Regressions

Hi, I have several different regressions for various sites within an area estimating Y from X. I would like to combine all these sites in to...

• Replies: 3
• Views: 7,927
12-28-2007, 11:31 AM
49. ### What's a logistic regression?

Hello, in college we learned multiple regression techniques (different models: linear, log-lin, lin-log, exponential, ...) - including all the...

• Replies: 4
• Views: 6,031
12-30-2007, 05:45 PM
50. ### Mallow's Cp Statistic as criterion for regression

I am building a multiple regression model using stepwise procedures and using the minimum Mallow's CP statistic as criterion for adding variables to...

• Replies: 2
• Views: 26,745
01-07-2008, 06:58 AM
51. ### statistical analysis of global warming/fossil fuels

Hello, I have to write a paper for a class (environmental management). I've been thinking quite a bit about global warming/weather trends and how...

• Replies: 0
• Views: 4,295
01-11-2008, 08:14 PM
52. ### what I dont get about statistical techniques!

I bought and read a book about multiple regression analysis (least squares) and it contains tests for each assumptions and not just linear models,...

• Replies: 0
• Views: 2,730
01-11-2008, 10:34 PM
53. ### learning logistic regression

If you're really good at multiple linear/non-linear regression analysis, would it be hard to learn how to do a logistic regression? Is that a lot...

• Replies: 1
• Views: 2,458
01-21-2008, 03:12 AM
54. ### Multiple regression analysis

Hi I was wondering if anyone can help me regarding multiple regression analysis. I have used the Stats program Minitab to analyse a large amount of...

• Replies: 1
• Views: 2,918
02-04-2008, 03:26 PM
55. ### 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: 6,334
02-04-2008, 05:48 PM
56. ### means versus total scores

Hi I have a question about using means versus total scores. Is it better to use one or the other when conducting analyses like multiple regression...

• Replies: 0
• Views: 2,348
02-09-2008, 12:25 PM
57. ### Chi vs R for goodness of fit

As an undergraduate, I had a physics professor who strongly preferred chi^2 as a measure of a good curve-fit as opposed to correlation coefficient r....

• Replies: 1
• Views: 2,882
02-16-2008, 05:10 PM

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