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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Now sure what to do now (4 variables, no interaction, significant correlated)

Hello everybody - I am in need of some statistical help as I'm a bit confused as to what to do next. I'll give you a rundown of my situation: I've...

• Replies: 7
• Views: 5,417
04-22-2010, 11:26 AM
2. ### linear regression short easy question

Hi there, I have the response Y and some covariates. I want to do linear regression. Among the covariates there is the covariate sex (1: male,...

• Replies: 7
• Views: 3,978
06-22-2010, 10:46 AM
3. ### Simple logistic regresssion question

I am currently doing a project that requires some simple logistic regression analysis in SAS(version 9.1). For some reason my results seem to be the...

• Replies: 7
• Views: 3,030
07-09-2010, 11:12 PM
4. ### is there a non parametric alternative to multiple linear regression?

Hi all, I would like to know is there a non parametric alternative to multiple linear regression? when I google the quesion I get a lot of info...

• Replies: 7
• Views: 27,992
10-07-2010, 03:37 PM
5. ### P value results

Dear Colleagues I did a bivariate regression using 10 independent variables on each dependent variable. all the results are significant at 95%...

• Replies: 7
• Views: 5,044
01-06-2011, 07:08 PM
6. ### Regression using gram-schmidt orthogonalization

Hello dear members, Hoping again to solicit some help from the knowledgeable members here, I thought I'd come to you with this question. I'm...

• Replies: 7
• Views: 5,932
12-07-2010, 11:31 PM
7. ### Nonlinear regression using the Gauss-Newton algorithm in C

Hey guys, I'm being asked to program this up in C. If any of you know of any good references for the Gauss-Newton algorithm, please post them for...

• Replies: 7
• Views: 10,897
12-17-2010, 10:56 AM
8. ### Hosmer-Lemeshow

Hi! How do you discussion the vaule for the Hosmer-Lemeshow goodness of fitt in a logistic regression? I tha value 0,290 bad? Regards!

• Replies: 7
• Views: 9,339
04-04-2011, 07:24 AM
9. ### Dealing with missing data?!

Hi guys, I was wondering if anyone can help me figure out what to do, I am pretty bad at statistics but needs must and all that! :p Basically...

• Replies: 7
• Views: 6,600
04-24-2011, 12:51 PM
10. ### Did I just fudge this categorical data transformation too much?

I have a public data set gathered from 336 hospitals, with about 28,000 rows. I want to see if there is relationship between a particular input...

• Replies: 7
• Views: 3,753
05-05-2011, 05:05 PM
11. ### In stepwise regression, can the number of predictors be >n?

Hi, I'm getting an error when I try to run a stepwise regression with backward elimination - it says there is not enough data in the columns. I...

• Replies: 7
• Views: 3,519
06-14-2011, 07:54 AM
12. ### standardised coefficients

Hi there, I have a basic question - SPSS output gives me unstandardized coefficients and standardized coefficient (the latter looking much nicer -...

• Replies: 7
• Views: 3,762
07-23-2011, 04:51 PM
13. ### Lmer Output/: variable re-levelling

Morning/Evening all I'm having a bit of a time getting the LME4 package to list ALL of my IVs, rather than all-1. By way of example, here is my...

• Replies: 7
• Views: 6,175
09-06-2011, 06:56 AM
14. ### Model building question-Is the researcher right?

I'm thinking about a researcher who made the following statement about a model(upon criticism of his interpretation of the data). "There is a...

• Replies: 7
• Views: 2,712
11-13-2011, 05:22 PM
15. ### Basic multiple regression question

Sorry, should've probably specified linear regression. I was given a data and ran a proc corr on it in sas. As you can see, x1 through x5...

• Replies: 7
• Views: 2,307
11-25-2011, 05:22 AM
16. ### Testing a predictive algorithm

I have an algorithm that takes text data and predicts polarity of the data between -1 and 1. I want to test this algorithm for it's ability to...

• Replies: 7
• Views: 2,913
12-08-2011, 07:38 PM
17. ### Can RSS be decreased to 0 when dimension increases?

Let's consider a simple example: I have two attributes X1 and X2, each has n values; response variable is Y. Using the two attributes together to...

• Replies: 7
• Views: 3,349
12-11-2011, 01:07 AM
18. ### non-integers in poisson GLM

Great forums, thank you to everyone who contributes to them. My question is regarding non-integer values from some data I collected on parrots...

• Replies: 7
• Views: 15,239
12-30-2011, 01:11 PM
19. ### Multi linear regression

Hello everyone, I am new here (and to stats in general). Anyway I am working on a project where I want to predict the value of an outcome and I...

• Replies: 7
• Views: 2,933
01-26-2012, 12:57 PM
20. ### testing whether the role of a predictor differs between two dependent variables

I have some questions about an analysis I am running. Sorry if they are very basic questions or completely off-course, but some help would be greatly...

• Replies: 7
• Views: 2,159
02-03-2012, 10:23 AM
21. ### Regression on Counts

Hi, I have data on number of laps mice have run over several days after an injection (simulate injury) and receiving one of two treatments...

• Replies: 7
• Views: 2,583
02-20-2012, 04:09 PM
22. ### Possible to analyze cross lag panel data with regression alone (no SEM)?

I have 2 (soon to be 4) waves of panel data. I have a relatively small sample size so I don't think I should use SEM - also I don't really...

• Replies: 7
• Views: 14,039
03-14-2012, 10:57 AM
23. ### Is Slope A statistically different from Slope B? *URGENT*

Hey everyone, Really need urgent help here. I am trying to determine if the change in the slope of a line (beta) is statistically significant...

• Replies: 7
• Views: 24,637
03-06-2012, 11:39 AM
24. ### The standardized and non standardized coefficients gives diff results

Hi. Some coworkers ran a regression and used first the beta to analyze the strength of the independent variables in a regression. However all the...

• Replies: 7
• Views: 6,099
03-09-2012, 05:21 PM
25. ### Calculating Cook's Critical Value

Hey can someone show me how to get F (4,15) (0.5) = 0.8783.

• Replies: 7
• Views: 5,254
05-12-2012, 01:37 PM
26. ### natural log of DV [or not?] in OLS regression? and collinearity questions for IVs

First I want to thank anyone who responds in advance. I'm grateful for any teaching I can get. Secondly, I'm math challenged. And my stats...

• Replies: 7
• Views: 4,648
07-05-2012, 10:26 PM
27. ### Interpreting results: repeated measures logistic regression

I am into some new territory with repeated measures logistic regression. The hypothesis for this study is that treatment will make more less...

• Replies: 7
• Views: 3,181
06-02-2012, 09:24 PM
28. ### Using OLS vs Probit/Logit to estimate a threshold

Suppose you're a meteorologist and want to predict whether tomorrow the temperature will exceed 20 degrees. Your boss gives you data where t is...

• Replies: 7
• Views: 4,285
07-04-2012, 04:21 PM
29. ### Getting F statistic from multiple t-statistics?

If I have Y = a + b1*X1 + b2*X2 + b3*X3 + error, and I have calculated sample t-statistics for b1 and b2, from this information (along with...

• Replies: 7
• Views: 2,828
07-24-2012, 03:24 AM
30. ### Multiple regression, why use categories

Hello, I have a question regarding multiple regression. I am reading a paper in which the author performed a multiple regression to predict...

• Replies: 7
• Views: 2,363
09-08-2012, 05:47 AM
31. ### Constant of 1: Why?

I know that in regression (well any linear model I would assume; correct this if I'm wrong) models there's a constant of 1 added to the model. I've...

• Replies: 7
• Views: 3,045
09-19-2012, 12:19 PM
32. ### Multiple regression

I have two predictors in my model. One is nominal and dichotomous (Male or Female), and is producing a negative β. The other predictor is ordinal and...

• Replies: 7
• Views: 1,423
01-09-2013, 12:52 PM
33. ### Baseball stat fans?

I play on online Baseball simulator that uses numerous ratings and processes them through an engine which spits out a box score and results. I...

• Replies: 7
• Views: 1,203
01-15-2013, 04:46 PM
34. ### How to evaluate model fit of parametric survival analyses?

Hello everyone, I'm using Stata to generate parametric survival analyses and I'm looking for methods to evaluate the model fit. As far as I know...

• Replies: 7
• Views: 2,053
01-24-2013, 07:09 PM
35. ### Help with understanding logit coefficient

Hi everyone, I'm very new to statistics and I would very much appreciate any help you can give me in understanding the coefficients in a logit model....

• Replies: 7
• Views: 1,976
03-28-2013, 10:19 AM
36. ### Relative regression analysis?

Hi, I am a new member of this thread. I need help with my hypothesis testing. Simply put, my hypothesis is " As A goes up, B and C go up but B...

• Replies: 7
• Views: 3,389
05-06-2013, 01:29 PM
37. ### Which model?

Hi, I'm writing my master thesis and I don't really know which model to use. The response variable is a countvariable: the number of broilers...

• Replies: 7
• Views: 1,526
05-06-2013, 05:51 PM
38. ### Nagelkerke and overall hit ratio won't improve in my logistic regression model!

Hi! I have a problem doing my course assignment(with SPSS): I can't find a way to improve the overall hit ratio and Nagelkerke levels even...

• Replies: 7
• Views: 4,141
06-14-2013, 03:31 PM
39. ### Likert Scale Regression Analysis

I want to perform a regression on some likert scale data. Basically its a scale which measures propensity for participative management. The rationale...

• Replies: 7
• Views: 14,338
08-13-2013, 04:09 PM
40. ### Regression Discontinuity

Hi... I'm trying to define a model for estimating the impact of a political program (increase in user fees). I thought about using the RD since...

• Replies: 7
• Views: 2,317
07-30-2013, 11:20 AM
41. ### One population, two sampling methods, how many logistic regression models?

I have 400 randomly selected urban households. I have 400 rural households selected from 15 villages census style. Food insecurity (dichotomous) is...

• Replies: 7
• Views: 1,585
08-20-2013, 01:14 PM
42. ### Logistic Regression with unequal proportions

Hello With the help of this forum I'm getting my head around logistic regression. My data contains a survived/died response and within the...

• Replies: 7
• Views: 2,351
10-09-2013, 03:06 PM
43. ### 4PL Non-Linear Regression, Transforming observed y values

Good Afternoon, I'm currently teaching my self how to fit response curves, and have run into some trouble. I currently need assistance on...

• Replies: 7
• Views: 5,016
10-22-2013, 12:33 PM
44. ### Interaction Terms: Logistic Regression

Dear forum, trying again... I would really like some advice on the proper construction and interpretation of a small experiment and analysis...

• Replies: 7
• Views: 3,118
10-23-2013, 05:33 PM
45. ### Do my data meet the assumptions for multiple linear regression?

~ There are no outliers in the standard residuals ~ Multicollinearity is not a concern ~ Independent errors are met (Durbin-Watson = 1.95) ~...

• Replies: 7
• Views: 3,350
01-23-2014, 08:12 AM

Hi everyone I am wondering if you can help me out. I am completing my PhD and have run into some problems interpreting some of the stats. I have...

• Replies: 7
• Views: 1,604
03-04-2014, 01:50 PM
47. ### Linear Regression:Controlling for categorical independent variables, WITHOUT dummies?

Short version: Does including a categorical nominal-level independent variable WITHOUT dummies still work as a simple control for other independent...

• Replies: 7
• Views: 2,560
03-30-2014, 01:24 PM
48. ### Clustered Robust SEs or Multilevel Modeling approach? HELP NEEDED :-)

Hello everyone, I would love to hear your quick reaction to a particular data structure my colleagues and I are working with because we keep...

• Replies: 7
• Views: 1,808
04-01-2014, 10:13 AM
49. ### Dispersion parameter

I have the understanding that the dispersion parameter, \phi, in generalised linear models needs to be known for deviance to meaningful or otherwise...

• Replies: 7
• Views: 1,797
04-14-2014, 07:11 AM
50. ### Can I compare regression models with same # predictors and same sample?

Hi there, As a part of my dissertation I want to compare a focal, new, variable against other well-known predictors of my outcome, so I plan to...

• Replies: 7
• Views: 1,789
04-28-2014, 11:49 AM
51. ### Continuous by contiuous interaction and non-linearity in OLS

To whom it may concern: I am conducting an OLS for a class assignment and have an interaction between ADHD and non-delinquent peers. I have...

• Replies: 7
• Views: 1,755
05-02-2014, 01:44 PM
52. ### R squared and Standard Error

Hi, Can standard error be 94.10 when R squared is 0.67 in a linear model? Thanks.

• Replies: 7
• Views: 1,728
07-22-2014, 02:31 PM

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