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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. t statistic or p value

    When reporting results of a regression for a paper, should the t statistics or p value be in parenthesis below the coefficients. I've seen some...

    Started by royalstatus‎, 07-18-2013 07:27 PM
    • Replies: 3
    • Views: 2,432
    07-18-2013, 08:10 PM Go to last post
  2. question about path analysis

    Hi I want to run a path analysis (not SEM ) I want to see whether two variables (A & B) predict another one (C). I also want to check whether C...

    Started by saf77‎, 07-18-2013 03:25 PM
    • Replies: 2
    • Views: 1,294
    07-18-2013, 03:53 PM Go to last post
  3. Standardized regression coefficients - why?

    Hello everybody :wave: When doing a multiple linear regression analysis, you would often like to know which predictor variable has the most...

    Started by RorschachDK‎, 07-16-2013 09:20 AM
    • Replies: 5
    • Views: 2,133
    07-18-2013, 08:57 AM Go to last post
  4. Decision keeping significant variables in Multinomial Logistic Regression?

    Hi! I have a question regarding how to decide which variables to keep in a multinomial logistic regression model. As example we can choose: ...

    Started by henrikskiold‎, 07-17-2013 05:46 AM
    • Replies: 1
    • Views: 2,031
    07-17-2013, 09:36 AM Go to last post
  5. simple instructions for beta regression needed

    Hi there I need to do a beta regression because my DV is a proportion. While I have read some papers online about it, I really do need an idiots'...

    Started by Ogriv‎, 07-17-2013 08:53 AM
    • Replies: 0
    • Views: 1,450
    07-17-2013, 08:53 AM Go to last post
  6. pooled OLS time invariant variables

    Are the coefficients of time invariant variables consistent and unbiased when I run a pooled OLS regression with panel data? Thanks

    Started by royalstatus‎, 07-16-2013 08:08 PM
    • Replies: 0
    • Views: 1,620
    07-16-2013, 08:08 PM Go to last post
  7. testing for a statistically significant difference between transformed coefficients.

    Hi All, I know it is straightforward enough to test for a statistically significant difference between two coefficients... but I have kind of a...

    Started by Salohcin‎, 07-16-2013 07:03 PM
    • Replies: 0
    • Views: 1,165
    07-16-2013, 07:03 PM Go to last post
  8. Collinearity = interaction ?

    Hello everybody I recently learned about interaction in linear regression and I´m having a hard time grasping the concept. As i understand it...

    Started by RorschachDK‎, 07-16-2013 02:53 AM
    • Replies: 0
    • Views: 1,663
    07-16-2013, 02:53 AM Go to last post
  9. Ordinal Logisitc Regression with Soccer

    Hi I have made up some statistical results and would like to analyse them. 2 teams playing against eachother: Team A and Team B There are 3...

    Started by zebbie‎, 07-11-2013 08:36 PM
    • Replies: 6
    • Views: 4,351
    07-15-2013, 10:26 PM Go to last post
  10. Linear regression with non-normal data?

    It is my understanding that for linear regression both data sets must be normally distributed. One of my two sets of data (x) is normally...

    Started by GrungyGoose‎, 11-13-2011 11:23 AM
    3 Pages
    1 2 3
    normality, regression
    • Replies: 43
    • Views: 78,807
    07-15-2013, 10:15 PM Go to last post
  11. Parameters Meaning

    What does parameters a and b represent in the equation y = A + B ln(x) ?

    Started by NSB‎, 07-15-2013 08:44 AM
    • Replies: 6
    • Views: 2,526
    07-15-2013, 05:43 PM Go to last post
  12. Analysis of promotional data by department

    Hi all, I have recently started an internship with a major UK retailer. My project is to come up with a model (and analysis) for promotions that...

    Started by cus003‎, 07-11-2013 02:44 PM
    • Replies: 6
    • Views: 1,198
    07-15-2013, 08:38 AM Go to last post
  13. Regression Model is Significant but...none of the independent variables are?

    I have a regression Model that is significant but none of the independent variables are? What does this mean? How can i discuss the results? ...

    Started by john_cappa‎, 07-10-2013 08:30 AM
    • Replies: 9
    • Views: 1,911
    07-14-2013, 06:18 PM Go to last post
  14. Slope over time

    Hello, I wanting to compare customer counts by different stores and thought that slope would be the best way to do this. So, I used linear...

    Started by Dbero‎, 07-13-2013 01:38 PM
    • Replies: 0
    • Views: 1,078
    07-13-2013, 01:38 PM Go to last post
  15. From B's to adjusted risk ratios - What am I missing?

    Hello everyone! Usually confounder adjusted risk ratios are reported in non-experimetnal studies, but I don't know how to calculate them. The...

    Started by Mase‎, 07-10-2013 06:22 AM
    • Replies: 2
    • Views: 1,212
    07-11-2013, 03:54 AM Go to last post
  16. Estimating Covariate Effects on Likert-Scale Response Data

    I am working on a problem where we elicit medical residents perceptions regarding the importance of specific core medical competencies...

    Started by meaneych‎, 07-10-2013 09:53 AM
    applied statistics, generalized linear model, hypothesis testing, likert scale, regresion
    • Replies: 1
    • Views: 1,922
    07-10-2013, 10:05 AM Go to last post
  17. Significant difference between regression models based on the sum of squared errors

    I'm trying to fit a simple linear regression to test the correlation between 2 variables: X and Y. The X variable is dependent on another...

    Started by weblover‎, 07-09-2013 06:30 AM
    • Replies: 3
    • Views: 1,679
    07-09-2013, 09:31 AM Go to last post
  18. simplified version of earlier post about contrasting output in binary reg &outliers

    I have conducted binary regression analysis for a single variable dummy coded into 15 dummy variables. My sample size was 512. My dissertation...

    Started by cratliff01‎, 07-08-2013 01:35 AM
    • Replies: 0
    • Views: 960
    07-08-2013, 01:35 AM Go to last post
  19. Which kind of Regression should i use for this case?

    Hello everyone, I'm new here and i have just begann with statistical research. I'd be very thankful if anyone could help me with my situation. I...

    Started by chimcanhcut‎, 06-26-2013 08:43 AM
    • Replies: 12
    • Views: 2,239
    07-07-2013, 04:35 PM Go to last post
  20. need help on contrasting outputs for blr enter vs stepwise and outliers

    Hi Again! I am fairly new to stats and have come a long way. I have asked a few questions and this forum has been great for input, thanks! I have...

    Started by cratliff01‎, 07-07-2013 03:17 PM
    • Replies: 0
    • Views: 1,358
    07-07-2013, 03:17 PM Go to last post
  21. Please advise: t-test for OLS dummy variable

    Hi. I need help. I'm writing a proposal and am not a statistician and am having trouble translating the notes from my professor into an equation. ...

    Started by rydswede‎, 07-07-2013 07:14 AM
    dummy variable, ols, t-test
    • Replies: 0
    • Views: 1,302
    07-07-2013, 07:14 AM Go to last post
  22. Manual Forward Selection - order of covariates

    Hi all, I have a conceptual model, with different covariates to explain an o=e relationship. I have confounders and effect modifiers. I am...

    Started by joebaker7‎, 07-06-2013 05:31 PM
    • Replies: 0
    • Views: 1,227
    07-06-2013, 05:31 PM Go to last post
  23. Plotting results of regression with interaction terms

    This is tangentially R-related, but mostly about presenting results of a regression including interaction terms. My ultimate objective is to produce...

    Started by kjo‎, 07-06-2013 04:17 PM
    confidence bands, group comparison, interaction terms
    • Replies: 0
    • Views: 1,623
    07-06-2013, 04:17 PM Go to last post
  24. help determining specifics of binary logistic regression

    I am going to try my best to ask this in the simplest way but with adequate info for someone to have an understanding of my dilemma. I would...

    Started by cratliff01‎, 07-02-2013 10:52 PM
    • Replies: 9
    • Views: 1,662
    07-05-2013, 10:41 PM Go to last post
  25. Combining various prediction equations.

    Hello all, I have been looking for a method to combine various linear prediction equations. These equations predict the same quantity but...

    Started by zoulzubazz‎, 06-21-2013 01:01 PM
    • Replies: 5
    • Views: 1,581
    07-05-2013, 12:55 PM Go to last post
  26. How do you handle this type of predictor variable?

    I run into data (in articles and at work) which has variables that mesure some phenomenon on say a 10 to 50 point scale. That is they have between 10...

    Started by noetsi‎, 07-01-2013 04:37 PM
    • Replies: 2
    • Views: 1,761
    07-05-2013, 12:27 PM Go to last post
  27. Mediation analysis with the DV following a gamma distribution.

    Hi there, I am in the early stages of data analysis and could really use some advise. Basically, I am testing whether music tempo influences...

    Started by claudiamalvinas‎, 07-04-2013 10:55 PM
    • Replies: 5
    • Views: 1,235
    07-05-2013, 12:01 AM Go to last post
  28. Regression Analysis for Aggregated Macro Economic Data with Thin Data

    Hello, I am new to this forum, so thank you in advance for any help or advice. I am looking to build a model that produces an aggregated, index...

    Started by dwienke‎, 07-03-2013 03:00 PM
    • Replies: 1
    • Views: 1,281
    07-03-2013, 03:03 PM Go to last post
  29. Diagnostics for logistic regression

    Anyone have any suggestions, or better links, on diagnostics for logistic regression. I know many of the assumptions (and thus tests such as...

    Started by noetsi‎, 07-03-2013 09:57 AM
    • Replies: 2
    • Views: 1,674
    07-03-2013, 01:03 PM Go to last post
  30. Non-linear modelling with several variables including a categorical variable

    Hello everyone, I am trying to model some data regarding a predator prey interaction experiment (n=26) in R. Predation rate is my response...

    Started by Robmais‎, 07-03-2013 03:11 AM
    gam, nonlinear regression
    • Replies: 0
    • Views: 1,542
    07-03-2013, 03:11 AM Go to last post
  31. regression analysis with Kendall tau coefficients

    Hi! I wish to run regression analysis in SPSS. My data is not completely linear and not normally distributed so I've used Kendall tau coefficient. I...

    Started by xyz8‎, 07-03-2013 02:17 AM
    • Replies: 0
    • Views: 1,264
    07-03-2013, 02:17 AM Go to last post
  32. Mispecification

    In theory, or as I understand theory,:p if you leave out a covariate that has a signficant effect on the DV and one IV still in the model you will...

    Started by noetsi‎, 07-02-2013 10:50 AM
    • Replies: 6
    • Views: 1,567
    07-02-2013, 01:55 PM Go to last post
  33. normality assumption in regression: THE FINAL ANSWER!!!

    ok, maybe it's not *the* final answer, but here's a theory of where this may be coming from. ever since noetsi started asking this question about...

    Started by spunky‎, 06-27-2013 04:31 AM
    • Replies: 11
    • Views: 3,300
    07-02-2013, 09:48 AM Go to last post
  34. [SOLVED] Robust regression

    I am new to this method. SAS uses one of two alternates to generate the weights that are central to addressing outliers in robust regression. One is...

    Started by noetsi‎, 06-28-2013 12:09 PM
    • Replies: 5
    • Views: 1,929
    07-01-2013, 05:17 PM Go to last post
  35. Log-Log Multiple Regression - How to incorporate discount + interpreting

    Hello smart people! I am working on a project where I’m trying to understand consumers’ price elasticity, and I was hoping I could get some input...

    Started by nils88‎, 07-01-2013 05:55 AM
    • Replies: 0
    • Views: 1,753
    07-01-2013, 05:55 AM Go to last post
  36. binary logistic regression using forward lr method in SPSS 21

    Hello! I am brand new to all of this, including this forum - and statistics don't come naturally to me. I have just finished chapter 4 of a...

    Started by cratliff01‎, 06-29-2013 10:20 PM
    • Replies: 0
    • Views: 3,750
    06-29-2013, 10:20 PM Go to last post
  37. Controling variable in regression analysis for the moderators

    Hi I am doing hierarchical regression to test the moderators effect between IV (violation perception) and DV1 (emotion) and DV2(behaviour). ...

    Started by atiah‎, 06-28-2013 01:11 PM
    • Replies: 0
    • Views: 1,461
    06-28-2013, 01:11 PM Go to last post
  38. Interaction, moderaton and regression

    I am facing a problem with my analysis. I have two dichotomous moderators between two continuous IV (violation perception) and DV (anger) variables....

    Started by atiah‎, 05-21-2013 08:05 AM
    • Replies: 4
    • Views: 1,474
    06-28-2013, 12:34 PM Go to last post
  39. df fot BETA t-test in ANCOVA

    Hi All, Perhaps this would be a silly question but, in ANCOV, what is the DF for t-test value for a covariate BETA coefficient calculated...

    Started by mcdomell‎, 06-28-2013 04:36 AM
    ancova, beta coefficient, degrees of feedom, t-test
    • Replies: 0
    • Views: 1,613
    06-28-2013, 04:36 AM Go to last post
  40. log binomial regression

    The author of an article I am reading suggests that in using this method the OR would reflect relative risk (which normally they don't although they...

    Started by noetsi‎, 06-27-2013 10:07 AM
    • Replies: 2
    • Views: 2,826
    06-27-2013, 02:11 PM Go to last post
  41. Several transformation in multiple linear regression to achieve normality

    I am an undergraduate student doing a dissertation on forecasting using multiple linear regression. I am creating a multiple regression equation in...

    Started by jovig18‎, 06-26-2013 02:35 PM
    • Replies: 9
    • Views: 1,514
    06-27-2013, 11:42 AM Go to last post
  42. Correcting for omitted variable bias without including problem variables?

    Hi All, I asked something similar earlier but I don't think I was very clear (so I will try again). I want to run a regression, let's say it is...

    Started by Salohcin‎, 06-26-2013 01:12 PM
    • Replies: 3
    • Views: 4,178
    06-26-2013, 02:55 PM Go to last post
  43. Interpretation of a regression with only one independent variable: a 2x2 interaction.

    Hello all, This is my first post. I am a newly-begun career-researcher and while I have come here now for help, I intend to continue to use this...

    Started by StephenD‎, 06-24-2013 08:33 AM
    2x2, anova, interaction
    • Replies: 3
    • Views: 1,989
    06-24-2013, 10:10 AM Go to last post
  44. Regression coefficient- random variable or a constant?

    Hello, The question is in the attached pdf, thanks in advance. I am sorry, but I having trouble writing math in the thread itself

    Started by mrrmd‎, 06-23-2013 09:45 AM
    • Replies: 5
    • Views: 4,480
    06-23-2013, 02:32 PM Go to last post
  45. near singular matrix error (dummy variable trap)

    Hi, Im running a regression in eviews and have 11 dummy variables for 12 different industries. As i already dropped one i do not understand why i...

    Started by slacknoise‎, 07-27-2012 07:07 AM
    • Replies: 3
    • Views: 24,869
    06-23-2013, 01:54 AM Go to last post
  46. Use of count data in regressions

    Does anyone know if count data can be used as x variables in regression without any issues? Assuming, I am trying to find the effect of aid on growth...

    Started by royalstatus‎, 06-22-2013 05:53 PM
    • Replies: 1
    • Views: 2,062
    06-22-2013, 06:44 PM Go to last post
  47. VAR EViews: Heteroskedasticity and non-normal distribution of reiduals - White Errors

    Hi, I am estimating the causality between the oil price and gdp in EViews. I am using quarterly and real data. I estimated the data as log and in...

    Started by leo22‎, 06-21-2013 04:41 AM
    • Replies: 1
    • Views: 5,291
    06-21-2013, 07:22 AM Go to last post
  48. Linear Mixed Models - required or optional?

    Hi everyone! We want to replicate a study where they use Linear Mixed Models (LMM) in the analysis and I'm not sure if they do so only because their...

    Started by Mase‎, 06-21-2013 07:15 AM
    • Replies: 0
    • Views: 1,846
    06-21-2013, 07:15 AM Go to last post
  49. Mediation analysis - Preacher & Hayes - could someone check what I've done please?

    I'm new to mediation analysis and have had a go with a simple model. I'd be thrilled if someone could have a look at this and let me know any issues...

    Started by Binka‎, 06-21-2013 03:06 AM
    • Replies: 0
    • Views: 3,101
    06-21-2013, 03:06 AM Go to last post
  50. TIME series

    Can you calculate a Durbin Watson statistic (that is meaningful) for logistic regression?

    Started by noetsi‎, 06-20-2013 10:20 AM
    • Replies: 0
    • Views: 1,204
    06-20-2013, 10:20 AM Go to last post
  51. Breaking up a variable

    Hi, I have a question about a regression I am running (actually an event history/survival analysis model, but my question should apply to all types...

    Started by turqwise‎, 06-20-2013 09:46 AM
    • Replies: 0
    • Views: 1,284
    06-20-2013, 09:46 AM Go to last post
  52. Question How can I handle an independent variable with many zeros?

    Hey everyone! I'm currently working on my Master's thesis and am slightly stuck in the analytical part. For my research, I am trying to figure out...

    Started by student9090‎, 06-18-2013 08:57 AM
    • Replies: 3
    • Views: 4,167
    06-19-2013, 08:25 AM Go to last post
  53. Cross validation in SPSS

    Hi, I need to conduct cross validation of my data to check for predictive validity. This is what I did so far. I divided the sample into two...

    Started by milehigh899‎, 06-10-2013 08:34 AM
    • Replies: 6
    • Views: 13,600
    06-19-2013, 03:34 AM Go to last post
  54. Ordinal scaled dependent variable (a ranking ~ with 500 categories): How to analyze?

    Hello, I'm currently facing the following challange: I want to perform a regression analysis, but I am not sure, which model is appropriate. My...

    Started by regressor‎, 06-18-2013 02:19 PM
    linear regression, ordered regession, proportional odds
    • Replies: 1
    • Views: 2,133
    06-18-2013, 03:27 PM Go to last post
  55. 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: 2,041
    06-18-2013, 01:34 PM Go to last post
  56. ask: no aid dummy in panel data using stata

    Dear all, I would like to ask the utilization of dummy variable in stata. Well, here is my model y=beta1 lnx1(1,x1)+beta2 nox1+beta3 lnx2...

    Started by iqbalkritingsekali‎, 06-17-2013 11:39 PM
    double log, dummy variable, econometrics, no aid dummy, stata
    • Replies: 0
    • Views: 1,201
    06-17-2013, 11:39 PM Go to last post
  57. using partial regression to fix omitted variable bias?

    Hi Everybody, I am trying to find the effect of introducing a new variable. That is, I want to run two regressions: y = b0 + b1x1 and y...

    Started by salohcin85‎, 06-17-2013 03:35 PM
    • Replies: 0
    • Views: 1,365
    06-17-2013, 03:35 PM Go to last post
  58. Generalised least squares: from regression coefficients to correlation coefficients?

    Hi All, I asked this on Stack Exchange, but it seems no-one there knows the answer. I wonder if anyone on talkstats can shed some light on it. For...

    Started by sqrtsqrt‎, 06-17-2013 12:40 PM
    correlation, generalised least squares
    • Replies: 0
    • Views: 865
    06-17-2013, 12:40 PM Go to last post
  59. Regression help needed

    Hi All, Assuming Congo gets foreign aid from Denmark, Sweden, UK, US and Germany. How do I go about getting the effect of Denmark's aid on Congo....

    Started by royalstatus‎, 06-17-2013 10:48 AM
    • Replies: 1
    • Views: 1,371
    06-17-2013, 12:07 PM Go to last post
  60. Linear Discriminant Analysis - Sample size requirements

    As general question, Are 70 observations sufficient to design a reliable decision rule for discriminating between two groups, with a Fisher linear...

    Started by cgmac‎, 06-16-2013 07:29 AM
    discriminant analysis, lda, linear prediction, prediction model, sample size
    • Replies: 3
    • Views: 3,769
    06-16-2013, 12:49 PM Go to last post

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