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# Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

1. ### Comparing coefficients with different input dependent variables, but the same model.

I have the following problem. I have the following model I use per sector (for example: Industrial, telecom, tech etc.): cccountry = a +...

• Replies: 0
• Views: 1,593
06-10-2011, 11:12 AM
2. ### Comparing curves fitted to two quadratic regressions

Hello, I have constructed two calibration curves, i.e. plotting known concentrations against response. Both of these sets of data seem to fit a...

• Replies: 2
• Views: 4,174
03-28-2012, 07:30 PM
3. ### Comparing different, related measures of the same thing to see which is most sig?

I want to start out saying my stat knowledge is weak. I am writing my Masters thesis and I'm struggling to understand how to get the answers I want....

• Replies: 1
• Views: 1,233
01-11-2015, 02:17 AM
4. ### Comparing effect sizes of two longitudinal linear relationships

Is there a way to determine if one longitudinal linear relationship is significantly stronger than another? I was planning on using regression...

• Replies: 2
• Views: 380
06-08-2017, 10:16 PM
5. ### comparing extremes of an independent variable

Dear all, I have been cracking my head for 2 weeks but i havent been able to figure out this, so i decided to ask for help. I have done a...

• Replies: 10
• Views: 1,558
08-04-2016, 07:18 PM
6. ### Comparing fit of GLM to OLS regression

Hello talkstat. First post in this magnificent forum! In my master thesis I'm estimating health care expenses to patients, who has experienced...

• Replies: 8
• Views: 1,967
08-29-2016, 06:28 AM
7. ### 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: 3,107
05-06-2013, 03:49 PM
8. ### Comparing independent variables in a regression

Hi, I have performed a multiple regression (in SPSS). This is fine, and I've got significant coefficients which tell me their influence on the...

• Replies: 0
• Views: 2,823
07-10-2010, 02:43 AM
9. ### Comparing linear regression models: a chi-squared test to compare adjusted R-squares?

Hi all, I used linear regression to analyze the data of one of my experiments, and used 3 predictors in a first model, added 4 more predictors in...

• Replies: 1
• Views: 1,353
08-06-2015, 03:04 AM
10. ### Comparing linear regressions - what method to use?

I have a number of measurements of the initial reaction rate of x reactions. Assuming linearity until t = y gives me x linear regressions with...

• Replies: 5
• Views: 1,793
06-01-2013, 09:04 AM
11. ### Comparing ln(y) =bX vs. OLS and other count data models

My data is a balanced panel. 12 years X 600 ids/year X 12 months = 864,000 observations. For about 150 of my 600 ids, at a certain point in this...

• Replies: 0
• Views: 3,158
02-08-2013, 08:17 PM
12. ### comparing logistic regression across groups?

Hello! I have a logistic regression model (let's call it M1) which was developed in an all-male sample. I would like to see if this model also...

• Replies: 0
• Views: 1,112
05-10-2013, 04:32 PM
13. ### Comparing logistic regression nested models

I put this here rather than the SAS board, because I am not sure what I am saying about this test is correct. I have run across comments that you...

• Replies: 13
• Views: 6,678
04-29-2013, 03:51 PM
14. ### Comparing magnitudes of logit/ordered logit coefficient estimates

Greetings! I have a logit model with a number of independent variables which are binary and therefore measured on the same scale. I am stuck on...

• Replies: 0
• Views: 1,497
08-01-2013, 02:36 AM
15. ### Comparing model fits of non nested models

Dear all, I am a student in Sociology at the University of Amsterdam and currently working on a paper on which I got stuck. Let me briefly...

• Replies: 0
• Views: 3,912
09-14-2010, 02:56 AM
16. ### Comparing Models

Today I was going to attempt to figure out and write some SAS code to compare nested linear models (variance explained). But I need some basics...

• Replies: 8
• Views: 2,146
04-28-2015, 01:31 PM
17. ### comparing models in logistic regresssion

Hello, I am planning a stepwise regression (backward or forward, haven't decided yet) of a set of predictors for my reference model to determine...

• Replies: 1
• Views: 966
04-28-2014, 10:52 AM
18. ### Comparing Multiple Regression across multiple groups

I am looking at 4 different predictors of eating disorders in 4 different groups of participants (Caucasians, Af Americans, Lations, and Asian...

• Replies: 1
• Views: 2,636
03-12-2013, 02:58 PM
19. ### Comparing negative binomial model to the null model with offsets

Hi there, I have a negative binomial model of count data with an offset (total counting effort) in R: ...

• Replies: 0
• Views: 1,928
11-05-2013, 02:38 PM
20. ### Comparing probability scores from logistic models

Hi, I want to be able to compare the probability scores from 2 different logistic regression models. I think it is not appropriate to directly...

• Replies: 1
• Views: 1,246
07-23-2015, 07:08 AM
21. ### Comparing regression coefficients - dependent samples

Hi, I used two methods (A and B) to obtain measurements in a group of subjects. The methods (ways of measuring) are different, but they should...

• Replies: 2
• Views: 1,920
07-17-2012, 07:07 AM
22. ### comparing regression coefficients among many groups

Hi all, first of all, sorry for my poor English since I'm not native English speaker, I have this simple OLS regression equation model with one...

• Replies: 2
• Views: 2,125
10-08-2013, 06:05 AM
23. ### comparing regression coefficients between different models to see if they are similar

Hi all; This is a very elementary problem; but unfortunately, my strengths do not like in statistics: I am trying to describe plant growth over...

• Replies: 8
• Views: 1,446
08-23-2013, 09:23 AM
24. ### 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: 2,624
07-01-2016, 03:10 PM
25. ### Comparing regression coefficients between two groups –> violation of independence?

Hi all, I have a question about the comparison of regression coefficients of two groups (using SPSS) and I think this is the correct sub forum for...

• Replies: 1
• Views: 1,840
05-15-2017, 03:47 PM
26. ### comparing regression coefficients from the same model

Hi, I think this question has been answered in bits and pieces here and there, but I am still a bit unsure about what the best approach for this is:...

• Replies: 12
• Views: 12,660
02-16-2012, 12:47 PM
27. ### Comparing regression equations

I am thinking of trying to use the logit model to determine the probability of whether patients will participate in a particular health program. My...

• Replies: 2
• Views: 3,723
02-08-2009, 11:31 AM
28. ### Comparing Regression Models

Hi, I wonder if anyone can help, I want to compare two linear regression models with each other but have no idea how to do it. I have two...

• Replies: 1
• Views: 2,402
03-02-2014, 09:37 PM
29. ### Comparing regression models for transformed and untransformed data

I feel like I saw an answer to my question on here in the past, so I apologize if this is a repeat, but I have been unable to find the answer today...

• Replies: 2
• Views: 7,162
05-25-2011, 12:36 AM
30. ### Comparing regression slope intercepts in SPSS

Hello, my name is Robert Hall and I have got myself in a bit of a pickle with my 3rd year research project. For my project I am looking at the...

• Replies: 4
• Views: 16,009
Jac
07-09-2012, 11:39 AM
31. ### Comparing Regression Slopes Across 3 Groups - SPSS

I am running a simple regression with one dependent variable and one independent variable but splitting the results by group (3 groups). So, I am...

• Replies: 4
• Views: 2,973
01-04-2014, 05:47 PM
32. ### Comparing regression slopes measured two times withinsubjets?

Although I am not a statistics-newbee, I have no clue how to contrast the following situation against null-hypothesis, i.e. I don't know how to do...

• Replies: 3
• Views: 1,238
08-08-2014, 12:33 AM
33. ### Comparing regressions

Hi, I want to conduct a sensitivity analysis on a regression to check if the results are highly influenced by the sample I have. Basically, I want...

• Replies: 3
• Views: 2,207
02-16-2012, 12:40 PM
34. ### Comparing relative importance within a subsample.

Hey everyone, I was wondering if there was a statistical technique that allowed you to compare the differences in effect sizes across two...

• Replies: 0
• Views: 973
09-06-2012, 01:52 PM
35. ### Comparing the outcome of two contingency tables

Hi all, I have a data set for two different days. The treatments and outcomes are same but the assays were performed on two different days. I...

• Replies: 4
• Views: 1,772
01-15-2016, 12:55 PM
36. ### Comparing time-based regressions

Hello! I have a ton of temperature data over time for 38 different subjects (over 100,000 lines of data) that I ran regressions on for each...

• Replies: 0
• Views: 1,717
wab
06-05-2011, 06:49 AM
37. ### Comparing two factors in five areas

I recently compared two factors in five different areas testing diversity of one factor against another. (Diversity was made quantitative for...

• Replies: 0
• Views: 1,047
10-14-2015, 04:01 PM
38. ### Comparing two linear regression gradients?

Hi, I am completely new to linear regression so this may sound daft, but I'm wondering if its possible to test for a significant difference between...

• Replies: 6
• Views: 4,771
04-29-2015, 09:08 AM
39. ### Comparison of 2 models with observed data - identical R2?

Hello! I am trying to compare field data with 2 models, but somehow both models give me identical R2. The models are derived from different sets...

• Replies: 0
• Views: 1,092
12-07-2014, 06:49 AM
40. ### Comparison of Coefficients of two different Regression Models

Hi everyone, I am analyzing the impact of price and promotion activities on sales in two separate 2-Way-Fixed Effects models. One model is for...

• Replies: 4
• Views: 2,854
01-27-2017, 03:53 PM
41. ### Comparison of linear and power law regression models

I'm quite a newb at statistics, with only one college-level statistics course behind me. I apologize in advance if my terminology and/or...

• Replies: 0
• Views: 3,246
eis
07-20-2011, 01:43 PM
42. ### Comparison of non-linear regressions from two different samples

Hi at all! I got a big problem during my data analysis and I’m already looking for a solution a few days. I hope somebody here can help me. I...

• Replies: 1
• Views: 6,434
07-19-2011, 08:13 PM
43. ### Comparison of one outcome to all the other outcomes

Here is some data to play with set.seed(1e4) color = factor(c(rep("blue",20), rep("red",20), rep("yellow",150)),...

• Replies: 0
• Views: 1,172
10-23-2016, 06:58 PM
44. ### Comparison of regression coefficients between (nested) geographic regions

Hi All, I would like to compare the effect of an explanatory variable (say X1) on a response variable (Say Y) between two geographic regions in...

• Replies: 0
• Views: 1,432
04-11-2016, 08:54 PM
45. ### Complex stansardized Residuals

Dear all, I am doing some nonlinear regression and use mathematica to calculate the associated FitResiduals and StudentizedResiduals. I am a bit...

• Replies: 2
• Views: 2,421
10-21-2010, 12:23 PM
46. ### complex survey analysis and weight variables in proc surveylogistic

I am analyzing the effect of Calcium on Obesity in adults based on the NHANES dataset. I have two questions. First, since I am combining two day...

• Replies: 1
• Views: 4,143
04-18-2011, 11:05 AM
47. ### Complicated Research quesiton

Im looking to do some research in the social science field and I have to do a statistical analysis of a complicated set of self report measures. I'd...

• Replies: 8
• Views: 3,578
12-30-2016, 12:33 PM
48. ### Composite score as predictor in MLR

Hello there, I want to conduct a stepwise multiple linear regression analysis with continuous independent variables, in which one of the IV's is a...

• Replies: 0
• Views: 1,899
08-26-2013, 08:25 AM
49. ### Compute time to sell (with 50% probability) at Price P from linear regression

I think this is a very basic question (from a total stat newbie). I'm trying to understand a problem I was given (I'm not a statistics student). It's...

• Replies: 0
• Views: 1,147
09-28-2014, 11:30 PM
50. ### Conceptual queries in modeling

Hi all, I am from engineering background. I would require your help in certain conceptual questions in modeling. Your help would be greatly...

• Replies: 2
• Views: 1,980
01-09-2016, 01:53 PM
51. ### Conceptual question on linear regression and data fitting

Hi all, I've been grappling with this question posed during class but can't seem to grasp it due to my sadly inadequate understanding of linear...

• Replies: 1
• Views: 1,350
04-05-2014, 04:13 PM
52. ### Concerns with using a mix of Continuous and Categorical IVs in Logistic Regression?

Before I get into it, I want to make clear that I'm not a statistics guy. I'm doing what I can to get through a thesis and stumbling my way forward....

• Replies: 7
• Views: 1,498
07-23-2015, 12:30 PM
53. ### Condition to put regression analysis zero?

Under what situation intercept can be force to zero in regression analysis?

• Replies: 11
• Views: 1,531
05-14-2017, 10:36 PM
54. ### Conditional change ordered logistic with different approach of same variable

LS, I am working with two-wave panel data looking at outcomes of retirement on self-rated health (5 point scale, very good to very bad)). It is...

• Replies: 0
• Views: 915
02-18-2014, 08:38 AM
55. ### Conditional expectation and consistent estimation

Could someone explain the following statement: are consistently estimable on the support of (x,z) if either: 1. (x,z) are discrete or, 2. are...

• Replies: 2
• Views: 1,084
09-16-2012, 04:00 PM
56. ### 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: 1,589
02-18-2015, 03:18 AM
57. ### conditional logit model_help with data interpretation

0 down vote favorite I have performed a clogit following the instruction of Aizaki et al.2012 but I am not sure on how to interpret some results...

• Replies: 4
• Views: 2,824
12-09-2016, 09:26 AM

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