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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 +...

    Started by alain1985‎, 06-10-2011 11:12 AM
    • Replies: 0
    • Views: 1,593
    06-10-2011, 11:12 AM Go to last post
  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...

    Started by Ri89‎, 03-08-2012 07:19 AM
    curves, quadratic regression
    • Replies: 2
    • Views: 4,174
    03-28-2012, 07:30 PM Go to last post
  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....

    Started by OkieSpladle‎, 01-10-2015 04:38 PM
    • Replies: 1
    • Views: 1,233
    01-11-2015, 02:17 AM Go to last post
  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...

    Started by dbt_healthpsych‎, 06-08-2017 12:51 PM
    effect sizes, longitudinal data, moderated multiple regres
    • Replies: 2
    • Views: 380
    06-08-2017, 10:16 PM Go to last post
  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...

    Started by niccolo‎, 08-04-2016 03:54 AM
    • Replies: 10
    • Views: 1,558
    08-04-2016, 07:18 PM Go to last post
  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...

    Started by Steinberg‎, 08-24-2016 03:36 AM
    fit, glm, ols, transforming
    • Replies: 8
    • Views: 1,967
    08-29-2016, 06:28 AM Go to last post
  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...

    Started by Anchyboom‎, 05-06-2013 12:43 PM
    • Replies: 3
    • Views: 3,107
    05-06-2013, 03:49 PM Go to last post
  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...

    Started by blastStu‎, 07-10-2010 02:43 AM
    • Replies: 0
    • Views: 2,823
    07-10-2010, 02:43 AM Go to last post
  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...

    Started by Maayke‎, 08-05-2015 06:43 AM
    • Replies: 1
    • Views: 1,353
    08-06-2015, 03:04 AM Go to last post
  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...

    Started by ulrika‎, 05-27-2013 11:29 AM
    chemistry, comparing slopes, reaction rate
    • Replies: 5
    • Views: 1,793
    06-01-2013, 09:04 AM Go to last post
  11. Question 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...

    Started by figuringout‎, 02-08-2013 08:17 PM
    count data, log, ols, regression, stata
    • Replies: 0
    • Views: 3,158
    02-08-2013, 08:17 PM Go to last post
  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...

    Started by will22‎, 05-10-2013 04:32 PM
    • Replies: 0
    • Views: 1,112
    05-10-2013, 04:32 PM Go to last post
  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...

    Started by noetsi‎, 04-15-2013 12:30 PM
    • Replies: 13
    • Views: 6,678
    04-29-2013, 03:51 PM Go to last post
  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...

    Started by milenkanik‎, 08-01-2013 02:36 AM
    interpretation, logit, ordered logit
    • Replies: 0
    • Views: 1,497
    08-01-2013, 02:36 AM Go to last post
  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...

    Started by thaiz‎, 09-14-2010 02:56 AM
    • Replies: 0
    • Views: 3,912
    09-14-2010, 02:56 AM Go to last post
  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...

    Started by hlsmith‎, 04-28-2015 09:12 AM
    • Replies: 8
    • Views: 2,146
    04-28-2015, 01:31 PM Go to last post
  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...

    Started by noob‎, 04-28-2014 08:52 AM
    • Replies: 1
    • Views: 966
    04-28-2014, 10:52 AM Go to last post
  18. Question 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...

    Started by dee515‎, 03-12-2013 12:31 PM
    • Replies: 1
    • Views: 2,636
    03-12-2013, 02:58 PM Go to last post
  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: ...

    Started by stikbeard‎, 11-05-2013 02:38 PM
    negative binomial, null hypothesis, r help
    • Replies: 0
    • Views: 1,928
    11-05-2013, 02:38 PM Go to last post
  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...

    Started by msaifk‎, 07-22-2015 11:27 PM
    • Replies: 1
    • Views: 1,246
    07-23-2015, 07:08 AM Go to last post
  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...

    Started by confusedscientist‎, 07-16-2012 04:51 AM
    comparing coefficients, dependent samples, linear regression, regression coefficients
    • Replies: 2
    • Views: 1,920
    07-17-2012, 07:07 AM Go to last post
  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...

    Started by bomool‎, 09-23-2013 05:09 AM
    compare coeff / groups
    • Replies: 2
    • Views: 2,125
    10-08-2013, 06:05 AM Go to last post
  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...

    Started by catbelize‎, 08-22-2013 03:47 AM
    coefficients, polynomial regression, standard error
    • Replies: 8
    • Views: 1,446
    08-23-2013, 09:23 AM Go to last post
  24. Comparing regression coefficients between groups

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

    Started by Mila‎, 07-01-2016 08:09 AM
    regression coefficients
    • Replies: 5
    • Views: 2,624
    07-01-2016, 03:10 PM Go to last post
  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...

    Started by greetprofeet‎, 02-11-2017 08:42 AM
    • Replies: 1
    • Views: 1,840
    05-15-2017, 03:47 PM Go to last post
  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:...

    Started by kk49‎, 02-14-2012 10:14 AM
    • Replies: 12
    • Views: 12,660
    02-16-2012, 12:47 PM Go to last post
  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...

    Started by Clouds1988‎, 02-07-2009 07:35 PM
    • Replies: 2
    • Views: 3,723
    02-08-2009, 11:31 AM Go to last post
  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...

    Started by NeuroPsychABW‎, 03-02-2014 03:49 PM
    model comparison, spss
    • Replies: 1
    • Views: 2,402
    03-02-2014, 09:37 PM Go to last post
  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...

    Started by PhDOH!‎, 03-27-2011 12:11 PM
    • Replies: 2
    • Views: 7,162
    05-25-2011, 12:36 AM Go to last post
  30. Comparing regression models with different predictor variables

    Hi I have done a multiple linear regression analysis on some measured acoustical parameters and have come up with tree equations that I wish to...

    Started by thelukewarm‎, 06-12-2011 04:42 AM
    • Replies: 1
    • Views: 2,609
    06-13-2011, 04:25 AM Go to last post
  31. 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...

    Started by rh241‎, 04-07-2012 02:43 PM
    • Replies: 4
    • Views: 16,009
    07-09-2012, 11:39 AM Go to last post
  32. 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...

    Started by JerLon‎, 01-03-2014 06:56 PM
    • Replies: 4
    • Views: 2,973
    01-04-2014, 05:47 PM Go to last post
  33. 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...

    Started by statQuestions‎, 08-07-2014 02:09 PM
    • Replies: 3
    • Views: 1,238
    08-08-2014, 12:33 AM Go to last post
  34. 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...

    Started by Oritteropus‎, 02-16-2012 11:53 AM
    • Replies: 3
    • Views: 2,207
    02-16-2012, 12:40 PM Go to last post
  35. 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...

    Started by CRIM‎, 09-06-2012 01:52 PM
    • Replies: 0
    • Views: 973
    09-06-2012, 01:52 PM Go to last post
  36. 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...

    Started by skgatx‎, 01-13-2016 09:31 PM
    • Replies: 4
    • Views: 1,772
    01-15-2016, 12:55 PM Go to last post
  37. 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...

    Started by wab‎, 06-05-2011 06:49 AM
    regression, time
    • Replies: 0
    • Views: 1,717
    06-05-2011, 06:49 AM Go to last post
  38. 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...

    Started by Patatas345‎, 10-14-2015 04:01 PM
    ancova, anova ecology biology, combining items, regression help, testing
    • Replies: 0
    • Views: 1,047
    10-14-2015, 04:01 PM Go to last post
  39. 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...

    Started by becread95‎, 04-25-2015 08:24 AM
    • Replies: 6
    • Views: 4,771
    04-29-2015, 09:08 AM Go to last post
  40. 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...

    Started by iloveapple‎, 12-07-2014 06:49 AM
    r2 regression
    • Replies: 0
    • Views: 1,092
    12-07-2014, 06:49 AM Go to last post
  41. 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...

    Started by LariB‎, 01-23-2017 04:08 AM
    • Replies: 4
    • Views: 2,854
    01-27-2017, 03:53 PM Go to last post
  42. 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...

    Started by eis‎, 07-20-2011 01:43 PM
    comparison, geomorphology, linear, power law
    • Replies: 0
    • Views: 3,246
    07-20-2011, 01:43 PM Go to last post
  43. 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...

    Started by gadus‎, 07-19-2011 01:09 PM
    • Replies: 1
    • Views: 6,434
    07-19-2011, 08:13 PM Go to last post
  44. 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)),...

    Started by Remi‎, 10-23-2016 06:58 PM
    categorical vairable, hypothesis testing, logistic regression, mcmcglmm
    • Replies: 0
    • Views: 1,172
    10-23-2016, 06:58 PM Go to last post
  45. 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...

    Started by arun‎, 04-11-2016 08:54 PM
    comparison, regression, standardization
    • Replies: 0
    • Views: 1,432
    04-11-2016, 08:54 PM Go to last post
  46. 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...

    Started by Clovis‎, 10-21-2010 10:59 AM
    • Replies: 2
    • Views: 2,421
    10-21-2010, 12:23 PM Go to last post
  47. 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...

    Started by sabina9‎, 04-18-2011 10:26 AM
    • Replies: 1
    • Views: 4,143
    04-18-2011, 11:05 AM Go to last post
  48. 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...

    Started by danmpc‎, 12-28-2016 06:52 AM
    • Replies: 8
    • Views: 3,578
    12-30-2016, 12:33 PM Go to last post
  49. 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...

    Started by Holmes‎, 08-26-2013 08:25 AM
    • Replies: 0
    • Views: 1,899
    08-26-2013, 08:25 AM Go to last post
  50. Compute and interpretation of logarithmic dependent variable

    Hello everyone, For a paper I am using a model from another paper. However, I have some difficulties determining how I should generate this...

    Started by Jantje Beton‎, 12-06-2015 01:16 PM
    • Replies: 0
    • Views: 828
    12-06-2015, 01:16 PM Go to last post
  51. Question 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...

    Started by mellema‎, 09-28-2014 11:30 PM
    linear regression, probability
    • Replies: 0
    • Views: 1,147
    09-28-2014, 11:30 PM Go to last post
  52. Computing confidence interval for a derivative of the population regression function

    Hello, My is question is in the attached pdf file. I hope this is the right place to ask this/ Thanks in advance!

    Started by mrrmd‎, 06-18-2013 10:20 AM
    • Replies: 5
    • Views: 2,033
    06-18-2013, 01:34 PM Go to last post
  53. Question 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...

    Started by rags140684‎, 01-04-2016 01:34 AM
    logistic, modeling, p-value, regression, statistics
    • Replies: 2
    • Views: 1,980
    01-09-2016, 01:53 PM Go to last post
  54. 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...

    Started by richya‎, 04-03-2014 01:53 PM
    • Replies: 1
    • Views: 1,350
    04-05-2014, 04:13 PM Go to last post
  55. 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....

    Started by OkieSpladle‎, 07-22-2015 12:33 PM
    • Replies: 7
    • Views: 1,498
    07-23-2015, 12:30 PM Go to last post
  56. Condition to put regression analysis zero?

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

    Started by Meenakshi Tiwari‎, 05-13-2017 02:34 AM
    • Replies: 11
    • Views: 1,531
    05-14-2017, 10:36 PM Go to last post
  57. 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...

    Started by Levi‎, 02-18-2014 08:38 AM
    conditional regression, dummy, interval, ordered logit
    • Replies: 0
    • Views: 915
    02-18-2014, 08:38 AM Go to last post
  58. 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...

    Started by mmgg‎, 09-16-2012 01:06 PM
    • Replies: 2
    • Views: 1,084
    09-16-2012, 04:00 PM Go to last post
  59. Smile 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...

    Started by AlinaVo‎, 02-18-2015 03:18 AM
    case control; matched, coefficients, conditional regression
    • Replies: 0
    • Views: 1,589
    02-18-2015, 03:18 AM Go to last post
  60. 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...

    Started by senzu‎, 12-08-2016 12:13 PM
    clogit, coefficient, logit model
    • Replies: 4
    • Views: 2,824
    12-09-2016, 09:26 AM Go to last post

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