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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Help with regression and related nominal values

Hey all. I'd like some input on a regression analysis. I have data that measures the reactions of individuals to a number of objects and to a number...

• Replies: 5
• Views: 1,199
10-20-2016, 10:25 AM
2. ### General guidance on interpreting residuals and diagnostics for linear regressions

Now that I'm more comfortable with regression (in SAS) and understand the assumptions needed for linear regression, I'm able to run simple models of...

• Replies: 5
• Views: 2,061
06-14-2016, 07:18 AM
3. ### Can someone help me interpret this data?

I'm performing multiple regression for an international relations thesis regarding various predictor variables and the outcome of intervention in...

• Replies: 5
• Views: 1,142
06-19-2016, 06:58 PM
4. ### Change regression model (\$x^*_i = x_i -10\$)

Hi there.:wave: I'm solving an exercise on multiple linear regression. Near the end I will be asked for the same data as the previous model, it is...

• Replies: 5
• Views: 2,351
06-26-2016, 04:18 AM
5. ### Compare the estimated model with the model with intercept-only

The question is: How do the test to compare the estimated model with the model with intercept-only ? How can I comment on the result ? I think we...

• Replies: 5
• Views: 2,285
06-26-2016, 12:08 PM
6. ### Comparing regression coefficients between groups

Hello! I am a psychology student and I’m doing a research which I need help with. The research is about parenting stress in parents of children...

• Replies: 5
• Views: 2,659
07-01-2016, 03:10 PM
7. ### Event probabilities from the regression analysis

Hi, I am looking for all possible sources (literature, articles, books) with descriptions how to transform different kinds of regression analysis...

• Replies: 5
• Views: 1,638
07-15-2016, 09:55 PM

Hello, I have a distribution which looks like a Khi-2 distribution, which model is most appropriate? I try linear regression, but normal...

• Replies: 5
• Views: 1,743
07-22-2016, 03:13 AM
9. ### VIF issues

Good afternoon, I ran a hierarchical regression model, (main effects in step 1, two-way in step 2 and three-way in step 3). My VIF in step 1 are...

• Replies: 5
• Views: 1,918
09-05-2016, 09:16 AM
10. ### Regression after multiple imputation

Hello every one. I want to perform simple binary logistic regression after multiple imputation but I constantly get this message and the execution of...

• Replies: 5
• Views: 1,426
10-10-2016, 07:45 PM
11. ### Generalized Least Squares (and ANOVA type III)

Dear all, I ran a type III ANOVA on a model of this kind: gls(y~x1+x2+x3). I found that both x2 and x3 are significant. However, if I drop x3 from...

• Replies: 5
• Views: 1,036
09-22-2016, 01:07 PM
12. ### Standard Regression Analysis / urgent help for stats beginner.

Hi Guys! I'm fairly new to statistics and am conducting a standard regression analysis with 1 predictor variable ( following from a pearsons...

• Replies: 5
• Views: 2,973
11-22-2016, 12:57 PM
13. ### log transformations

This has confused me for years. Commonly in financial analysis you log Y or sometimes an X. I have never been sure if when you log Y you have to...

• Replies: 5
• Views: 971
03-20-2017, 03:08 PM
14. ### Robust Regression v. Transformation of Variable (or both?)

Hello everyone, I have a question about a regression I am running. I believe it's a pretty basic question, although after a couple hours...

• Replies: 5
• Views: 1,300
03-13-2017, 10:30 AM
15. ### The bootstrap method for medical modelling

I am part of a team creating a model for paediatric hospitalised patients and would appreciate some help. We are looking to produce an accurate...

• Replies: 5
• Views: 2,462
03-04-2017, 10:01 PM
16. ### How to handle dummy variable with fraction as possible values

Hello , I am working on a data with a dummy variable values not just 0 or 1. It has fractions as values which denote the number of month within a...

• Replies: 5
• Views: 509
08-13-2017, 05:27 AM
17. ### Interaction effects regression wiith dummy variables

Hello everyone, I am doing an analysis about the export diversification effect during the financial crisis. I have my dependent variable as log...

• Replies: 5
• Views: 353
08-25-2017, 09:19 AM
18. ### 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: 4,091
04-13-2006, 09:59 AM
19. ### 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: 2,544
05-06-2006, 01:42 PM
20. ### 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: 2,976
07-19-2007, 02:33 PM
21. ### Combining Prediction Intervals

I'm having trouble finding how to combine a number of prediction intervals. The best way to explain the problem is: Imagine a race with 4 relay...

• Replies: 4
• Views: 7,871
07-22-2010, 04:12 PM
22. ### 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: 5,782
12-30-2007, 05:45 PM
23. ### 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: 4,281
04-07-2008, 01:50 PM
24. ### 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: 3,065
05-25-2008, 09:07 AM
25. ### 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: 2,622
08-06-2008, 03:39 AM
26. ### 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: 6,937
08-17-2008, 12:49 PM
27. ### Three way interactions in regression

Hi, I'm trying to figure out how to do three-way interactions with multiple regression. I am trying to predict an IV by a three DVs and the...

• Replies: 4
• Views: 22,098
03-20-2009, 11:49 PM
28. ### 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: 13,381
12-05-2008, 03:40 PM
29. ### 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: 11,535
10-20-2008, 04:47 AM
30. ### 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: 3,141
01-20-2009, 06:33 AM
31. ### three way interactions and centering in multiple regression

Hello, I am examining three variables to see whether they interact with each other to predict my DV using multiple regression. I typically center my...

• Replies: 4
• Views: 4,593
02-16-2009, 08:43 PM
32. ### Linear Regression in Excel...

Hello everyone ! If you don't mind, a question regarding linear regression in Excel. I will be having a an Intro to Statistics test in May and...

• Replies: 4
• Views: 4,796
02-26-2009, 11:57 AM
33. ### Linear Regression Models (3)

β ε note: also under discussion in "Math Help Forum"

• Replies: 4
• Views: 3,275
05-19-2009, 08:03 PM
34. ### Linear Regression: reversing the roles of X and Y

Simple linear regression: Y = β0 + β1 *X + ε , where ε is random error Fitted (predicted) value of Y for each X is: ^ Y = b0 + b1 *X (e.g....

• Replies: 4
• Views: 16,635
05-27-2009, 10:39 AM
35. ### scale issues

Please look at the following descriptive labels for a scale of importance. Extremely critical (7) Highly important (6) Very Important (5) ...

• Replies: 4
• Views: 2,644
10-19-2009, 08:11 AM
36. ### Hpw to Determine the Hypotheses for a T-test Study?

• Replies: 4
• Views: 4,575
11-29-2009, 12:04 AM
37. ### very quick question about the 'intercept'

If I am asked to state the intercept which one do I quote? Estimate, Std error, t value or Pr(>|t|) ? (If it makes any difference I am doing a...

• Replies: 4
• Views: 3,810
12-03-2009, 04:47 PM
38. ### What is the history of regression analysis?

Hi all, Recently, I am using regression analysis to do a geophysics study. Now the study is almost done. I start to write my report. I want to add...

• Replies: 4
• Views: 12,319
01-12-2010, 12:22 PM
39. ### Linear Regression Underestimating Sales Forecast

Guys, I want to share a flawed method i've been dealing with. I am currently using linear regression to find the coefficent of Year-over-year...

• Replies: 4
• Views: 5,010
05-28-2010, 07:59 AM
40. ### How many data points needed before a nonlinear regression model can be performed?

With a within-subject design of only one independent variable, I'm wondering how many data points (levels of the indept variable along X axis) do I...

• Replies: 4
• Views: 8,988
08-09-2010, 03:29 PM
41. ### problem with independent variables

Hello, I need your advice. I have a data file, with a binary dependent variable and some independent ones. For each person (case), there were 3...

• Replies: 4
• Views: 4,159
08-20-2010, 09:12 PM
42. ### Regression Analysis Help

Hi All, first post here, glad to be part of this forum. After surveying my population, I am currently experimenting what factors (about 10...

• Replies: 4
• Views: 2,983
09-04-2010, 04:36 PM

You have the ramp-servicing contract for a midsize car wash. For wash workers you use predominantly part time workers, all of whom have sufficient...

• Replies: 4
• Views: 4,549
09-09-2010, 03:49 PM
44. ### Descriptive research and regression analysis?

Please pardon my ignorance...can I use multiple regression analysis in a descriptive research design to answer my hypotheses? If not, can anyone...

• Replies: 4
• Views: 8,422
09-19-2010, 01:11 PM
45. ### Logistic regression with dependent variables

Dear All I'm trying to perform logistic regression to determine risk factors for retinopathy of prematurity (ROP). The outcome is binary 1=...

• Replies: 4
• Views: 5,793
10-06-2010, 06:35 PM
46. ### Need some help with multiple regression

Hi guys. For my project i need to to a regression with a bunch of data I've gathered. I have 7 variables and i did the regression in excel and got...

• Replies: 4
• Views: 2,184
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11-03-2010, 03:28 AM
47. ### How to deal with the dependent predictors in the regression ?

My data have some high correlated predictors, so it fit worse in the linear regression. what regression methods are proposed to solve this...

• Replies: 4
• Views: 3,481
11-04-2010, 11:18 AM
48. ### Estimation method for ratio dependent variable?

Hi, Logistic regression is used if the dependent variable is a discrete choice variable. My dependent variable is not a discrete choice variable,...

• Replies: 4
• Views: 11,541
11-12-2010, 05:30 AM
49. ### choosing the right model

Hello, Does it makes sense to test H_knot : Beta1 = 0 after having rejected H_knot : Beta2 = 0. So in other words, if it appears that a 2nd...

• Replies: 4
• Views: 2,792
11-23-2010, 12:03 PM
50. ### Desperately Need Help with Regression Analysis..Please :)

hello :) I'm new here (and in doing statistics in general). I have to do a regression analysis on panel data (10 groups, 9 years - 90...

• Replies: 4
• Views: 3,490
01-20-2011, 11:17 AM
51. ### Moved: single observation multi-year variables

• Replies: -
• Views: -
02-13-2011, 10:10 AM
52. ### Simple command in SAS for regression with a large number of covariates?

I'm a new poster and I searched before creating this thread, so I hope I'm not raising a common question that is constantly being answered here. ...

• Replies: 4
• Views: 4,327
03-02-2011, 04:25 PM
53. ### Solve for the following values

I need to solve for a,b,c,d by hand showing calculations but I can't seem to find any equations that will help me here. We haven't been given any...

• Replies: 4
• Views: 2,601
03-11-2011, 01:50 PM

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