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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Linear regression: Prais-winsten method in SPSS with confidence intervals

Hello Any help greatly appreciated.... I've conducted a linear regression but as the data is autocorrelated (Durbin Watson = 0.5) I wanted to...

• Replies: 0
• Views: 2,184
09-06-2015, 07:07 AM
2. ### Derivation of an equation of Influential Analysis in OLS

Hi to everyone, I'm new to this forum and I'm very pleased for the existence of this forum, since the fact that forums in these times are in decay....

• Replies: 2
• Views: 570
04-17-2017, 10:32 PM
3. ### Regression for qualitative ind. vars and a quantitative dep. var

I need to perform a regression analysis where the dependent variable is quantitative and there are numerous qualitative independent variables. These...

• Replies: 0
• Views: 1,327
07-03-2012, 06:23 PM
4. ### The Connection between conditional expectation and unconditional expectation

William Greene, Econometric Analysis, 7th edition, 20th page: The zero conditional mean implies that the unconditional mean is also zero, since E...

• Replies: 3
• Views: 12,487
10-02-2011, 02:18 PM
5. ### R^2 vs AIC paradox?

Hi Everyone, I have the following situation which has me a bit puzzled. I've fitted two different linear models to a data set and would like to...

• Replies: 13
• Views: 16,187
04-07-2011, 11:10 PM
6. ### standardized residuals

hi is it possible to do (standardized residuals) in SPSS for detecting outliers more than one time.

• Replies: 3
• Views: 1,936
10-03-2013, 10:33 AM
7. ### Business Stats, regression

Hey everyone, Does anyone know the steps that minitab or any other stats software does to eliminate variables when doing forward selection,...

• Replies: 0
• Views: 3,310
04-01-2011, 05:37 PM
8. ### Urgent help, please...thanks . A.S.A.P

Thanks admin for your ongoing feedback... I am facing this problem with the Leckert Scale...follows: data set to be collected - 5 points:...

• Replies: 3
• Views: 2,842
04-18-2009, 07:21 PM
9. ### Dummy variable regression with a few observations

Dear all, I have 26 observations about Italian cities. I would like to control for regional fixed effects by adding a dummy variable for each...

• Replies: 0
• Views: 1,246
11-09-2013, 12:22 PM
10. ### Conditional logistic regression- effect of modifiers

Hi everybody, I am new here in this forum. I am studying the effect of air pollution (PM) on health outcomes, and the characteristics that might...

• Replies: 0
• Views: 1,595
02-18-2015, 03:18 AM
11. ### binary logistics for suicide ideation and attempt

Hi, I am doing analysis for relatively large sample of high school students (4000) of predicting lifetime usage of psychoactive substances as...

• Replies: 6
• Views: 1,862
09-12-2012, 05:38 PM
12. ### Getting values larger than 1 for a logit test?

I have run a logit test on a binary dependent variable "gambled?" against "Age" in STATA. I have the dependent variable coded as 0 for no and 1 for...

• Replies: 4
• Views: 1,353
04-08-2014, 02:02 PM
13. ### Mediation with Regression Analysis Need Help some basic Question (Using SPSS)

I have 3 variables (2 are independent and 1 is dependent). All three variables are measured with questionnaires consisting of multiple questions...

• Replies: 0
• Views: 912
05-01-2014, 12:42 AM
14. ### Beginner question

When I do a regression using monthly returns to get a beta using the CAPM, are the alpha and beta values also monthly? Thanks!

• Replies: 1
• Views: 1,870
11-23-2011, 04:06 AM
15. ### Urgent: Help needed with ordinal data

Hey all, So far I mostly worked with quantitative data, but now I have to do an analysis on effects alcohol consumption. Now I got a questionnaire...

• Replies: 1
• Views: 1,693
05-29-2013, 09:44 AM
16. ### Multiple linear regression in cross-country analysis with small sample size

Hello, While conducting small student’s research project I’ve faced a little problem. I’m using aggregated country data (not in individual, but...

• Replies: 0
• Views: 185
10-01-2017, 07:10 AM
17. ### simple logistic regression question

I'm doing a willingness to pay survey to see if people are willing to spend \$1 for clean water. I randomly sampled 100 people and one of the...

• Replies: 5
• Views: 5,045
02-28-2011, 12:36 AM
18. ### curvature

I have a set of data that i would like to find out if it has a curvature. i was told that you can apply ANOV analysis to see if curvature is...

• Replies: 1
• Views: 1,516
11-16-2012, 11:57 PM
19. ### Regression Analysis based on least square method

Dear colleagues, I need some help with SPSS. I did an experimental study and found that from dimensional analysis that my dependent variable is...

• Replies: 0
• Views: 1,579
04-20-2014, 07:07 AM
20. ### Is this data acceptable for a multiple regression?

Hi all, I have data from a community with MIN size (g) MAX size (g) MAX size without neighbours (g), Height (cm) and Area (cm^2). I have this for...

• Replies: 3
• Views: 2,147
04-02-2012, 01:58 PM
21. ### Simple regerssion

I am new to stats and this may be very easy for Seniors. In my regression analysis I want to find, how “% change” is affected by other variables, the...

• Replies: 12
• Views: 2,136
06-10-2012, 02:17 PM
22. ### Correlation

Is it possible to correlate two categorical variables? I have a data on building homes in different cities. I want to show correlation on how...

• Replies: 2
• Views: 1,249
02-09-2014, 01:39 AM
23. ### Need help! Fairly simple questions.

Hey guys, So I successfully proved that the sum of epsilons (the e in y=B0+B1*x+e) equaled 0. Now how do I prove that the sum of xi's...

• Replies: 0
• Views: 2,293
01-27-2011, 09:29 PM
24. ### Interpreting an order logit

This isn't my homework, but was acctually meant for my blog. I had planned on running the ordered logit models, running predicted probabilities and...

• Replies: 0
• Views: 2,270
09-23-2010, 07:33 PM
25. ### Linear Model Prediction

I'm working on a linear model that looks like: Price = B0 + B1(Gender) + B2(Age) + B3(Credit Type) + B4(Home) ... The predictior is price, and...

• Replies: 13
• Views: 3,296
12-21-2011, 11:06 AM
26. ### Question about predicted probabilities from a logit model

So I have the following data and logistic regression mode = df=data.frame(income=c(5,5,3,3,6,5), won=c(0,0,1,1,1,0), ...

• Replies: 3
• Views: 2,461
08-14-2012, 01:00 PM
27. ### Noob question about predictive modeling

I'm trying to understand some concepts related to predictive modeling. So let's say that I have the following data sample and am trying to regress...

• Replies: 2
• Views: 1,658
09-04-2013, 03:46 AM
28. ### twoway ANOVA, post hoc test? New to statistics.

This is probably easy, but this is new to me, hoping for some help here:tup:

• Replies: 1
• Views: 1,460
02-08-2016, 07:39 PM
29. ### anova repeated measures with interaction term

i hva been sitting here for 6 hours trying to figure out what i am doing wrong, but i cant figure it out. I am doing anova with repeated measures....

• Replies: 0
• Views: 1,065
02-12-2016, 07:57 AM
30. ### Latent Growth Model in AMOS: Positive path coefficients but a negative avg slope?

Hi Everyone - I have a latent growth model with the intercept and slope predicting 7 equally-spaced measurements of a continuous variable. The model...

• Replies: 0
• Views: 1,437
03-07-2014, 02:21 PM
31. ### Validation for prognostic marker

Dear All, I am completely lost in the area of statistics. I have a dataset of 265 cancer patients with a novel protein marker as well as the known...

• Replies: 3
• Views: 2,004
04-05-2015, 12:24 PM
32. ### How to do a added variable plot in minitab?

Hi, I have a data set of measurements for body fat, two of the variables are age and neck circumference. I've been asked to estimate the amount...

• Replies: 0
• Views: 3,119
11-13-2013, 05:05 PM
33. ### Linear Models-Given three objects of unknown weight and a set of scales with one pan.

Hi all, I am new to this and pure desperation is starting to set in. Below is my problem: Three objects with unknown weights are weighed on a...

• Replies: 1
• Views: 1,557
11-14-2013, 02:37 AM
34. ### Applied linear regression model

any one can tell me the "real life application of linear model" with example ????

• Replies: 0
• Views: 1,465
12-01-2013, 07:59 AM
35. ### 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: 2,913
03-16-2006, 08:43 AM
36. ### How to report and interpret non significant single regression? Its urgent plz help

HI, can anyone please help me interpret this picture? we have not learnt this yet. will be grateful! ...

• Replies: 1
• Views: 692
04-20-2017, 10:10 AM
37. ### random factor levels with highly varying numbers of data points

Hi! I am doing a fairly straightforward analysis where we have a dependent variable which we try to measure many times under different conditions...

• Replies: 0
• Views: 1,369
09-13-2013, 02:23 PM
38. ### Multiple regression analysis

Hello All, Please help me with my multiple regression analysis result. My questionnaire consisted of 7 independent variables using 7 point...

• Replies: 0
• Views: 769
07-21-2016, 02:56 AM
39. ### Non constant variance in residuals?

Hi, When doing Linear Regression or Generalised Linear Modelling, and the residuals show non constant variance, how do you remove it? For example,...

• Replies: 3
• Views: 4,724
03-28-2013, 08:57 PM
40. ### Probably a dumb question...

I have been using R to code my analyses for my research projects, and unfortunately my statistics background is sparse and ancient; please pardon me....

• Replies: 1
• Views: 2,373
09-24-2011, 01:00 PM
41. ### Novice needs help with Maximum Likelihood Estimation of Logit Model

Hi all, I’d be grateful for some help. I realise this is perhaps elementary stuff for many but as someone without a formal statistics background, I...

• Replies: 3
• Views: 3,456
09-16-2011, 09:21 AM
42. ### moderated hierarchical regression

Hello, I urgently need help. I have to test a hypothesis regarding moderating role. I know the procedure how to do it in SPSS with moderated...

• Replies: 0
• Views: 3,143
09-03-2012, 02:51 PM
43. ### 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: 5,749
12-30-2007, 05:45 PM
44. ### 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: 4,148
01-11-2008, 08:14 PM
45. ### 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: 2,560
01-11-2008, 10:34 PM
46. ### 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: 2,345
01-21-2008, 03:12 AM
47. ### Help with dummy variable

Hi, I have a set of OLS-fixed effects models comprising continuous and dummy variables, with the latter used as control parameters. My models aim...

• Replies: 1
• Views: 2,202
05-27-2013, 09:25 PM
48. ### Is the difference significant.

I'm using stata since only a few weeks for my thesis. I can use some help regarding the following: I wanted to know what the mean grade is for...

• Replies: 0
• Views: 4,961
10-28-2010, 10:04 AM
49. ### Instruments

I have a question concerning endogenous variables. I want to do the following OLS regression: Grade Point Average=constant + φ1 work hours + φ2...

• Replies: 1
• Views: 2,150
11-08-2010, 12:40 PM
50. ### Instrumental variable analysis

Dear people, In my simple regression analysis are two variables endogenous. GPAi = α + β•Wi +β•Wi^2 + θ•Si + θ•Si^2 + Qi•φ + εi Where Wi and Si...

• Replies: 0
• Views: 4,792
11-23-2010, 07:55 AM
51. ### Co-efficient interpretation in Gamma Regression Model

Hi Guys, I am trying to fit a gamma regression model using a log link model. Now, I get a negative co-efficient for one of my IVs. What is the...

• Replies: 0
• Views: 3,497
07-06-2011, 01:49 PM
52. ### Comparing importance of predictors - unstandardized or standardized beta?

Hi, can someone explain me should I compare importance of two predictors by their unstandardized or standardized beta? If both are significant, I...

• Replies: 3
• Views: 3,128
05-06-2013, 03:49 PM
53. ### Matching

Dear experts, For a fMRI (functional brain scan) experiment, I am comparing scans from 40 subjects with a condition that may or may not affect the...

• Replies: 0
• Views: 1,544
01-27-2014, 06:54 AM
54. ### correct regression model for dependent variable

Hi all, I am new to this forum and I hope that the qestions that are bothering me can be answered together with your help. I have data (N=220)...

• Replies: 11
• Views: 2,362
02-12-2015, 08:47 AM

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