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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Panel Data Model. Problem !

    Hi everyone, First, Ihave to mention that I am newbie in statistic so I may have some evident questions ! Actually, I am working on a...

    Started by Ihssanee‎, 03-23-2015 10:29 AM
    • Replies: 2
    • Views: 1,252
    03-23-2015, 11:51 AM Go to last post
  2. Multiple regression: one of my significant factors has outliers, what should I do?

    So I ran a multiple regression and found two factors that explained one of my dependent variables quite well. The problem is that one of the two...

    Started by battlepope‎, 03-19-2015 09:18 PM
    • Replies: 2
    • Views: 1,762
    03-22-2015, 07:29 AM Go to last post
  3. Two linear regressions or one moderated multiple regression?

    Hi everyone, I would REALLY appreciate any help on this since I've exhausted a lot of options for help already. I have a set of a data with...

    Started by mxw‎, 03-20-2015 04:10 PM
    • Replies: 6
    • Views: 1,778
    03-21-2015, 04:42 PM Go to last post
  4. [Log.reg.] Can I include confounder that does not have all categories of exposure?

    Hello. I am working on a thesis in public health science, and am stuck until this current problem i solved. Your help will be highly appreciated! ...

    Started by kristian‎, 03-21-2015 04:51 AM
    • Replies: 0
    • Views: 844
    03-21-2015, 04:51 AM Go to last post
  5. Question Weighted Regression

    I have a few questions in regards to setting up and running my weighted regression: Firstly, some background. I am comparing point of subjective...

    Started by JackFarr‎, 02-14-2015 08:28 AM
    pse, regression, sem, weighted
    • Replies: 1
    • Views: 1,430
    03-17-2015, 10:36 PM Go to last post
  6. Hierarchical regression in SPSS (how to enter interactions when you have a quadratic)

    Hello there! I want to confirm if I am entering my variables in the proper way in SPSS for multiple regression. I have four variables: 1) student...

    Started by tropie‎, 03-17-2015 02:04 PM
    hierarchical regression, quadratic, regression analysis
    • Replies: 3
    • Views: 1,975
    03-17-2015, 03:32 PM Go to last post
  7. How do I select a method of regression analysis - Allometry - Animal Growth - Gnu

    I am analysing the growth of the wildebeest or gnu. To do this I am comparing the changes in A: Body length (L), B: Girth (G) and C: Shoulder height...

    Started by Gnu‎, 03-16-2015 09:21 AM
    allometry, anatomy, biology, growth, regression
    • Replies: 2
    • Views: 2,059
    03-17-2015, 01:04 AM Go to last post
  8. Centering Variables in Interaction with Lagged Dependent Variable

    I have to run this regression: Y (t) = a + b1 X (t-1) + b2 Y (t-1) + b3 X (t-1)*Y (t-1) Y at time "t" is regressed using as IVs X at time t-1,...

    Started by jjarg‎, 03-16-2015 04:25 PM
    interaction, lagged variable
    • Replies: 1
    • Views: 1,170
    03-16-2015, 05:04 PM Go to last post
  9. log-lin regression vs lin-lin

    Hi guys, I'm a new guest in this forum so first of all I'm Giovanni and nice to meet you. I'm solving a problem set of Econometrics course and...

    Started by gionni25‎, 03-15-2015 10:23 AM
    • Replies: 2
    • Views: 3,014
    03-16-2015, 03:24 AM Go to last post
  10. pooled OLS regression - industry dummy coefficients higher than the rest

    Please delete this thread. I did not find the button to delete it. Thanks a lot Best Mat

    Started by Mat_Latter‎, 03-15-2015 03:15 AM
    • Replies: 0
    • Views: 1,550
    03-15-2015, 03:15 AM Go to last post
  11. Post Difference between two regression coefficients

    Hi All: This is the context. I have three x variables with following relationship: x1 + x2 = x3. Now, I run these two equations: y = a1 + b1x1...

    Started by hs2000‎, 03-12-2015 09:01 PM
    • Replies: 1
    • Views: 969
    03-13-2015, 08:18 AM Go to last post
  12. Question Correct statistical test to use for my data (correlation/regression)

    Hello everyone, Potentially a silly question (but I am new to all of this): I have collected data from a focal animal study on Naked mole-rats....

    Started by Naked.Mole.Rat‎, 03-13-2015 06:13 AM
    • Replies: 0
    • Views: 748
    03-13-2015, 06:13 AM Go to last post
  13. Interpreting coefficients from GLM output

    Hi, I'm trying to educate myself further on using GLM and to do so I figured it'd be easiest to conduct a simple experiment where I knew the...

    Started by schwartzaw‎, 03-04-2015 10:23 AM
    • Replies: 9
    • Views: 2,343
    03-12-2015, 12:54 AM Go to last post
  14. Multi-Level Model

    Why in multi-level models can you get away with fewer observations per predictors? I know that I have heard and seen this before, but I am not...

    Started by hlsmith‎, 12-09-2014 08:57 AM
    • Replies: 9
    • Views: 2,605
    03-11-2015, 11:56 AM Go to last post
  15. Variance of parts equal to variance of whole?

    Good morning, I ran a hierarchical regression to test if variables A and B (established in the literature) are mediated by variable C (my research...

    Started by Monash_RA‎, 03-09-2015 06:37 PM
    dependent variables, explained variance, hierarchical regression, mediation analysis, multiple regression
    • Replies: 0
    • Views: 920
    03-09-2015, 06:37 PM Go to last post
  16. Interpretting Negative Beta Co-efficients in Regression

    Hi there, I am having trouble interpreting negative beta co-efficients. I think I am missing something simple perhaps... I have run a...

    Started by a_living_stone‎, 03-07-2015 02:54 AM
    • Replies: 1
    • Views: 1,312
    03-08-2015, 01:18 AM Go to last post
  17. Statistics Regression Question

    I need help with this question! The graph is in the picture below! A popular, nationwide standardized test taken by high-school juniors and...

    Started by zolton5971‎, 03-05-2015 09:56 AM
    • Replies: 5
    • Views: 2,088
    03-07-2015, 02:40 PM Go to last post
  18. Simple regression model but needs improvement

    I have been working on trying to fit a linear regression line to try to predict college gpa where the the prediction variables are high school...

    Started by raidernation‎, 03-07-2015 12:04 PM
    • Replies: 0
    • Views: 1,176
    03-07-2015, 12:04 PM Go to last post
  19. Multiple logistic regression - need for interaction checking?

    Hello, and thank you for reading this post. I am a medical doctor with limited statistical knowledge, so bare with me... I am trying to answer...

    Started by jujufish‎, 02-24-2015 09:37 AM
    interactions, multiple regression
    • Replies: 3
    • Views: 1,973
    03-07-2015, 08:07 AM Go to last post
  20. unit price of total pris?

    Hi, I am a first year economic student and are having some fun with regressions. I am doing a a regression analyse of some example data I have...

    Started by bodesmiller‎, 03-05-2015 05:05 AM
    • Replies: 0
    • Views: 1,230
    03-05-2015, 05:05 AM Go to last post
  21. Which multilevel approach is the right one? Help needed choosing a method.

    Hi everyone, I have a data set with a very specific structure and I am looking for a suitable way to analyze it. To be more precise, I am...

    Started by numerator‎, 03-04-2015 06:47 PM
    multilevel model, nested structure
    • Replies: 0
    • Views: 956
    03-04-2015, 06:47 PM Go to last post
  22. Help with interaction terms

    Hi, I have two categorical variables (race and field of study) as a part of my model to predict degree completion. In addition to the original model,...

    Started by commuter1112‎, 03-04-2015 01:08 PM
    • Replies: 1
    • Views: 1,373
    03-04-2015, 03:58 PM Go to last post
  23. Help with interactions in regression

    Hi I would really appreciate if anyone could please help me with this. I am doing a regression analysis, looking at the effect of 2 drugs (A or B)...

    Started by Bio_Stat‎, 03-03-2015 07:42 PM
    • Replies: 3
    • Views: 1,284
    03-04-2015, 08:19 AM Go to last post
  24. Binary Logistic Regression- SPSS Output

    Dear TalkStats Forum, I am currently looking into a data-set which measures previous cyber-crime victimization as well as whether the participants...

    Started by Dulusu‎, 03-02-2015 09:36 AM
    • Replies: 1
    • Views: 1,061
    03-03-2015, 03:58 PM Go to last post
  25. Interpreting Coefficients in Mediation Analysis with Logged Variables

    Hello out there. I really hope u can help me because i've tried to find a solution to my problem for ages now.. im performing a mediation analysis...

    Started by loop‎, 03-03-2015 05:22 AM
    • Replies: 0
    • Views: 1,131
    03-03-2015, 05:22 AM Go to last post
  26. transform probit into logit

    Hi everyone, is there a way to transform results obtained from a probit regression into results obtained from a logit regression? I am looking for...

    Started by natoe‎, 03-02-2015 04:06 AM
    • Replies: 1
    • Views: 1,507
    03-02-2015, 04:21 AM Go to last post
  27. Question About Excluded Variable

    Hi,please help me. I'm working on a thesis to determine the effect of independent variables(four independent variables, denoted by X1,X2,X3 and X4)...

    Started by muridbertanya‎, 03-01-2015 09:26 PM
    • Replies: 0
    • Views: 1,426
    03-01-2015, 09:26 PM Go to last post
  28. statistical tool/program for obtaining stiffness properties by force-deflection data

    I am performing flexural testing of composite honeycomb sandwich panels as per D7250,desired deliverables(stiffness values G,U and D) are obtained...

    Started by Brook79‎, 03-01-2015 11:42 AM
    • Replies: 0
    • Views: 1,228
    03-01-2015, 11:42 AM Go to last post
  29. Dependent variable is function of itself

    I have a model: qty=a.price+....(other IVs) Price is calculated as sales_amount/qty. Hence for a customer, if we aggregate data of a certain...

    Started by abhik‎, 02-27-2015 01:17 PM
    • Replies: 2
    • Views: 1,630
    02-27-2015, 08:55 PM Go to last post
  30. R-Squared Change - Multivariate Multiple Regression

    Hello everyone, I've been asked to conduct a multivariate multiple regression with multiple DVs (3 measures of a dependence construct) predicted...

    Started by trujilloma‎, 02-25-2015 07:34 PM
    multivariate regression, r squared change
    • Replies: 0
    • Views: 1,766
    02-25-2015, 07:34 PM Go to last post
  31. Non-linearity in OLS-Models, Multinominal Logit-Regression

    Hey there, I have a question connected to the Ols-Model in case of nonlinearity between parameters. What should be done if the assummption of...

    Started by looop‎, 02-15-2015 03:22 PM
    multinomial logit, non-linear, ols regression, regression assumption
    • Replies: 2
    • Views: 1,458
    02-25-2015, 12:49 PM Go to last post
  32. Hot to analyze data at various levels (company and employee)?

    I have a data set with data at two different levels. I want to analyze the perceptions of employees of a specific management practice. The data...

    Started by DrJames‎, 02-20-2015 06:19 PM
    • Replies: 1
    • Views: 1,890
    02-25-2015, 12:45 PM Go to last post
  33. meta analysis of many regression studies

    Ive searched the forum for answers to this but no joy yet so please help if you can. I have about 30 published studies looking at the dependence...

    Started by andyspeak‎, 02-17-2015 06:17 AM
    • Replies: 9
    • Views: 2,501
    02-25-2015, 05:31 AM Go to last post
  34. Question Discrepancy between Geogrebra, Excel, Desmos, and TI-83 PLUS...what's the deal?

    As my title implies, there is a discrepancy between Geogebra, Excel, Desmos, and TI-83 Plus. Let me explain myself I have created a fifth and...

    Started by nddn‎, 02-21-2015 03:19 PM
    • Replies: 3
    • Views: 1,860
    02-21-2015, 08:09 PM Go to last post
  35. Checking homoscedasticity in repeated measures

    Hello, When checking the assumption of constant variance for repeated measures data, am I correct in thinking that the variance of residuals...

    Started by deeuu‎, 02-18-2015 11:36 AM
    homoscedasticity, regression assumption
    • Replies: 0
    • Views: 1,278
    02-18-2015, 11:36 AM Go to last post
  36. 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: 1,415
    02-18-2015, 03:18 AM Go to last post
  37. Multiple regression where only part of the sample completed the follow up survey

    Hi, For my dissertation I trying to determine whether several emotions predict behavioural intention and behaviour. Participants were asked to...

    Started by Chris12‎, 02-16-2015 03:33 PM
    • Replies: 0
    • Views: 1,061
    02-16-2015, 03:33 PM Go to last post
  38. Interaction between binary and continuous variable in OLS

    I am trying to examine the association between maternal education and child school test scores using the following equation. TestScore = β0 + β1...

    Started by monzur‎, 02-16-2015 12:02 AM
    interaction effect, ols regression
    • Replies: 3
    • Views: 1,846
    02-16-2015, 08:09 AM Go to last post
  39. Regression / modelling help

    Hi All, I'm new here so If I've posted this in the wrong place or its not practical then I apologise. I'm new to regression so helpfully Im...

    Started by bobastic‎, 01-14-2015 05:44 PM
    • Replies: 5
    • Views: 2,191
    02-15-2015, 08:45 PM Go to last post
  40. 2sls regression

    hi, what be the consequenses of using the same explanatory variables in a simultaneous equations system? for example if both the supply and the...

    Started by bodesmiller‎, 02-15-2015 11:51 AM
    • Replies: 0
    • Views: 1,172
    02-15-2015, 11:51 AM Go to last post
  41. regression analysis reporting: chemist needs help!

    Hello, everyone. We have some regression data we'd like to report, but aren't sure how to best do so. Here's the situation: A lab analyst runs a...

    Started by artie mckim‎, 02-15-2015 10:28 AM
    • Replies: 0
    • Views: 987
    02-15-2015, 10:28 AM Go to last post
  42. how to draw a logistic curve in word, excel etc

    Hello, I am working on a binary logistic regression and would like to insert the logistic sigmoid curve. do you know how to draw such a curve in...

    Started by t.wang21@yahoo.com.au‎, 02-14-2015 08:32 PM
    • Replies: 0
    • Views: 2,312
    02-14-2015, 08:32 PM Go to last post
  43. B Coefficient

    I'm having some difficulty making sense of a logistic regression. I think I have the interpretation right based on a university tutorial on how to...

    Started by jle‎, 02-12-2015 12:40 AM
    • Replies: 5
    • Views: 1,549
    02-13-2015, 08:41 AM Go to last post
  44. Design question: proportion explained variance by placebo effect

    Dear all, I have a design question about investigating a placebo effect. Does anyone have a clue how to analyze the proportion explained variance...

    Started by maart91‎, 02-12-2015 07:37 AM
    • Replies: 2
    • Views: 1,167
    02-13-2015, 04:23 AM Go to last post
  45. Error Propagation in Separate Binomial Logistic Regressions

    On http://en.wikipedia.org/wiki/Multinomial_logistic_regression#Introduction is written, that the estimation errors of separate binomial logit models...

    Started by consuli‎, 02-12-2015 03:08 PM
    • Replies: 0
    • Views: 743
    02-12-2015, 03:08 PM Go to last post
  46. 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)...

    Started by andik‎, 01-19-2015 09:33 PM
    • Replies: 11
    • Views: 2,157
    02-12-2015, 08:47 AM Go to last post
  47. Mixed effects model residual analysis (help!)

    Hello, I have little experience with mixed-effects models and could do with some help when it comes to checking model assumptions. I am using...

    Started by deeuu‎, 02-10-2015 08:40 AM
    • Replies: 1
    • Views: 2,302
    02-11-2015, 04:34 AM Go to last post
  48. risk of using group level variables to predict individual outcomes in regression

    Hi, GOAL: I have been running a multivariate linear regression to predict student outcomes (grades; at the individual student level) from several...

    Started by Thea‎, 02-10-2015 08:09 PM
    • Replies: 0
    • Views: 1,076
    02-10-2015, 08:09 PM Go to last post
  49. Linear Regression (Age Interval, 10 years)

    Hi guys, I initially ran a linear regression, however we found that age (by year) generated a negligible B coefficient. In response we...

    Started by jle‎, 02-09-2015 09:29 PM
    • Replies: 5
    • Views: 1,304
    02-10-2015, 08:54 AM Go to last post
  50. F-Test for SLR & MLR?

    I am trying to finish a homework problem for a grad level stats class and can't seem to find an answer anywhere to this question written in plain...

    Started by statsisnotmyfriend44‎, 02-09-2015 10:10 PM
    f-test, linear regression, mlr, slr
    • Replies: 1
    • Views: 1,595
    02-10-2015, 02:09 AM Go to last post
  51. Interpretation of linear-log regression model (Neep Help)

    Dear All, I had a problem with my data of growth in percentage regarding negative and positive values due to which I could not transform it into...

    Started by b1lal‎, 02-09-2015 06:57 AM
    interpretation, log-linear, regression analysis
    • Replies: 2
    • Views: 1,384
    02-09-2015, 01:46 PM Go to last post
  52. Help with PCA-Loading Interpretation

    Hey People Im currently learning to use multivariate analysis in my PhD project, and have an Abstract deadline and a Statistician on holiday so I...

    Started by Taraaa‎, 02-09-2015 08:06 AM
    • Replies: 0
    • Views: 1,112
    02-09-2015, 08:06 AM Go to last post
  53. Writing R^2 strictly in terms of simple correlations among variables

    Say we have the following regression Y_i=\beta_0+\beta_1X_{1i}+\beta_2X_{2i}+\epsilon_i I want to write the multiple R^2 for this regression...

    Started by Jake‎, 10-17-2014 03:45 PM
    • Replies: 8
    • Views: 2,906
    02-07-2015, 07:06 PM Go to last post
  54. Transforming skewed data without decreasing kurtosis

    Have a data set with negative kurtosis and skewness values. Have tried numerous transformations but cannot find a solution that generates acceptable...

    Started by DrJames‎, 02-06-2015 03:09 PM
    • Replies: 4
    • Views: 1,923
    02-07-2015, 12:52 PM Go to last post
  55. Validity of the regression equation.

    Along with this post, I have attached a screenshot of my assignment and I am confused about the validity of regressions equations. I plotted linear...

    Started by Tansai‎, 02-06-2015 12:04 PM
    • Replies: 1
    • Views: 1,189
    02-06-2015, 01:10 PM Go to last post
  56. Ambulance utilisation: help choosing a method

    Hi, I need some advice in selecting a statistical test please. I am researching ambulance utilisation rates at a population level (defined by a...

    Started by john_martin‎, 02-04-2015 05:16 PM
    • Replies: 8
    • Views: 1,691
    02-06-2015, 04:57 AM Go to last post
  57. Must categorical variables always be dummy coded in linear regression?

    My question is must we always dummy code categorical variables in linear regression. What if I wanted to understand the overall effect of a...

    Started by dce219‎, 02-05-2015 11:05 PM
    • Replies: 2
    • Views: 1,607
    02-06-2015, 04:43 AM Go to last post
  58. Regression Model is not full rank

    Hi all, I am trying to detect relationship of crop yield at the end of the growing seasson (1 dependent variable) using amount of precipitation in...

    Started by szm‎, 11-19-2012 12:18 PM
    full rank, multicollinearity, p-value, problem, regression
    • Replies: 3
    • Views: 12,885
    02-06-2015, 03:08 AM Go to last post
  59. Fixed term is (Intercept) --Dredge function

    Hi, i'm currently running a glm model in R and have attempted to use the following code: Model:...

    Started by arl139‎, 02-05-2015 09:52 PM
    dredge, glm, logistic regression
    • Replies: 2
    • Views: 5,336
    02-05-2015, 11:08 PM Go to last post
  60. Which Blood Pressure Tool better predicts kidney function: help choosing test.

    Hi there, I am trying to see whether there is an advantage of using one blood pressure tool over another at predicting kidney function. Both...

    Started by Robspierre‎, 02-05-2015 06:19 PM
    • Replies: 1
    • Views: 1,013
    02-05-2015, 10:12 PM Go to last post

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