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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Reporting logistic regression results

    Hi, I have a study that aims to find out the association of a binary outcome (e.g. BP control-Y/N) with categorical independent variables e.g....

    Started by Yi Ling‎, Today 02:52 AM
    interpretation, logistic regression
    • Replies: 1
    • Views: 73
    Today, 09:38 AM Go to last post
  2. Help

    Hi Everyone, Is a sample of 20 companies too small for a dividend payout study? in SPSS I get a negative Adjusted R sq you will find attached...

    Started by c_b_s90‎, 05-22-2015 08:14 PM
    • Replies: 0
    • Views: 126
    05-22-2015, 08:14 PM Go to last post
  3. Significant effect disappears when separate analyses are conducted

    Dear all I have conducted an experiment in which subjects concurrently perform two tasks. Task A stays always the same, while Task B has two...

    Started by Scarlatti‎, 05-21-2015 10:14 PM
    • Replies: 0
    • Views: 107
    05-21-2015, 10:14 PM Go to last post
  4. The Dummy Variable Alternative to the Chow Test

    Hello, I'm writing a paper for econometrics. The deadline is approaching, but we have some problems with answering a question about the model that...

    Started by econometrics‎, 05-21-2015 04:34 PM
    • Replies: 0
    • Views: 102
    05-21-2015, 04:34 PM Go to last post
  5. Errors on fit parameters with no errors on data

    Hi all Many, maybe all, statistical packages I know of (R, matlab, root, sas) will allow you to fit data with no associated errors, and give you...

    Started by jonascj‎, 05-20-2015 11:38 PM
    errors, fit
    • Replies: 0
    • Views: 100
    05-20-2015, 11:38 PM Go to last post
  6. Estimate of Variance

    How does one obtain the best estimate of the variance of observations around the fitted model in SPSS? My thinking is that the best estimate of...

    Started by helppleasestats‎, 05-19-2015 06:36 PM
    fitted model, regression
    • Replies: 0
    • Views: 112
    05-19-2015, 06:36 PM Go to last post
  7. Hell Please. Linear Regression Model

    Which of the following is NOT assumed to contribute to uncertainty in predicting y from x in a standard Model I linear regression. a. Uncertainty...

    Started by helppleasestats‎, 05-18-2015 08:57 AM
    help me, linearregression, mcq
    • Replies: 8
    • Views: 276
    05-19-2015, 09:42 AM Go to last post
  8. Is logistic regression appropriate for this study?

    A study that compares 3 different categorical outcomes

    Started by professorzoom‎, 05-17-2015 07:00 PM
    • Replies: 0
    • Views: 150
    05-17-2015, 07:00 PM Go to last post
  9. Residual variance of OLS regression from R-Squared?

    Can residual variance of OLS regression be derived from R-Squared, and if so, how?

    Started by BigBugBuzz‎, 05-16-2015 03:04 PM
    r-square, residual
    • Replies: 2
    • Views: 188
    05-17-2015, 11:51 AM Go to last post
  10. logistic regression for customer data

    Hey guys, i'm supposed to build a logistic model, but i'm not quite sure how to begin. i have two data sets. One for the customers( all...

    Started by Lisa_‎, 05-16-2015 09:16 AM
    • Replies: 0
    • Views: 133
    05-16-2015, 09:16 AM Go to last post
  11. New with Stata - Changes in Beta event study question

    Hello, I am trying to do an event study regarding beta and check if beta changes after stock splits dates. I am planning on checking if the...

    Started by Quatze‎, 05-14-2015 06:16 PM
    • Replies: 0
    • Views: 127
    05-14-2015, 06:16 PM Go to last post
  12. Paired/Matched Sample with Hierarchical Moderated Regression Question

    Hello Everyone, I would greatly appreciate some help with this question. I am trying to help a good friend with her dissertation and am now...

    Started by psycgirl‎, 05-14-2015 05:14 PM
    • Replies: 0
    • Views: 74
    05-14-2015, 05:14 PM Go to last post
  13. Time series regression with blocks of years?

    I am evaluating the impact of policy changes over time. There are three separate time periods, each representing a number of years, and I want to see...

    Started by katiegud‎, 05-14-2015 06:16 AM
    • Replies: 3
    • Views: 168
    05-14-2015, 03:29 PM Go to last post
  14. Independent Variables and Dependent Variable Regression Analysis

    I came across this question which best explain what a need in one of the forum, however it was not answered. Please assist based on the scenario...

    Started by Mosima‎, 05-12-2015 02:39 PM
    • Replies: 7
    • Views: 297
    05-14-2015, 01:55 AM Go to last post
  15. GLS regression STATA

    Hi, is there a command in Stata that allows for GLS regression without panel data? or am I missing something? Thanks

    Started by harleystats‎, 05-13-2015 06:00 PM
    regression analysis, regression help
    • Replies: 0
    • Views: 109
    05-13-2015, 06:00 PM Go to last post
  16. Nested data structure

    Hi, I wonder whether the community can help. The goal is to run a series of regressions with correctly estimated standard errors. Note that the...

    Started by dnh‎, 05-13-2015 05:59 AM
    • Replies: 0
    • Views: 104
    05-13-2015, 05:59 AM Go to last post
  17. Regression with averaged data

    I have data that represents the average for a group, which I would like to use for my response variable. I have different variables that are...

    Started by twotone4‎, 05-12-2015 08:24 PM
    averages, regression
    • Replies: 0
    • Views: 137
    05-12-2015, 08:24 PM Go to last post
  18. Logistic regression and significance of continuous variables across 3 periods

    I'm currently working on a logistic regression analysis in R with a binary response variable (0 = non-used; 1 = used location). I am modeling...

    Started by arl139‎, 05-12-2015 07:28 AM
    logistic regression, regresiion
    • Replies: 3
    • Views: 151
    05-12-2015, 12:22 PM Go to last post
  19. Multiple Regression - Is it possible to constrain the coefficients to be positive?

    Another stumper ... I am running a multiple regression with two independent variables. The regression results look good, except that one coefficient...

    Started by statburner‎, 05-11-2015 01:08 PM
    • Replies: 6
    • Views: 199
    05-11-2015, 07:26 PM Go to last post
  20. Linear regression on a weighted moving average

    Hi, I was hoping to get some advice. I want to run a forecast using linear regression but wanted to account for any potential cyclic variations in...

    Started by Indigosoul‎, 05-11-2015 04:52 PM
    • Replies: 0
    • Views: 120
    05-11-2015, 04:52 PM Go to last post
  21. β and b

    Hi, Just starting with regression analysis but am confused with the interchangeability of β and b. Can someone clarify the difference? Thank...

    Started by stats_challenged‎, 05-11-2015 04:49 AM
    • Replies: 3
    • Views: 240
    05-11-2015, 04:31 PM Go to last post
  22. Determining if Cook's D is influential

    Hi there, I have been having a lot of difficulty calculating if Cook'd values are influential. I realise that there are no exact rules, but I am...

    Started by tbuzz‎, 05-10-2015 08:55 PM
    • Replies: 0
    • Views: 100
    05-10-2015, 08:55 PM Go to last post
  23. Logistic regression - Violations of observations independence

    Hi, I need some help about logistic regression. My participants were divided in 2 groups (control group and experimental group). They then...

    Started by Gorgonzola‎, 05-09-2015 03:56 PM
    • Replies: 0
    • Views: 171
    05-09-2015, 03:56 PM Go to last post
  24. Regress help

    Hey everyone, I have a problem I was wondering for help. I have the regression model for a class, and i choose to predict returns on stocks with...

    Started by ko86804n‎, 05-08-2015 01:28 PM
    • Replies: 3
    • Views: 194
    05-08-2015, 11:12 PM Go to last post
  25. Combining variables prior to performing regression analysis

    Hello to all. I am running a regression analysis to evaluate if the joint analysis of costs and benefits can explain medicinal plant selection better...

    Started by patri‎, 05-04-2015 05:20 PM
    combining variables, linear regression, multiple regression, simple regression
    • Replies: 3
    • Views: 348
    05-08-2015, 05:01 PM Go to last post
  26. Regression Excel Output - Missing Values

    Hey guys, I've attached a screen shot of the table we have to use for my stats final. This is what we had on the midterm earlier this semester...

    Started by schmitam12‎, 05-08-2015 09:06 AM
    • Replies: 0
    • Views: 95
    05-08-2015, 09:06 AM Go to last post
  27. Question creating a statistical Analysis for treatment validation with placebo cond.

    Hi there, promising board of infinite knowledge, 1. Randomizing the Conditions This is what I want to do. One individual, two conditions. ...

    Started by LeeFX‎, 05-08-2015 05:03 AM
    • Replies: 0
    • Views: 76
    05-08-2015, 05:03 AM Go to last post
  28. One observation per factor level combination in regression

    Hi... I was wondering if you can perform multiple linear regression with a mix of categorical and quantitative variables, if you only have one...

    Started by twotone4‎, 05-07-2015 02:23 PM
    factor, multiple regression, prediction, regression
    • Replies: 2
    • Views: 182
    05-07-2015, 09:46 PM Go to last post
  29. Post Help with interpreting results of a bivariate probit regression please

    I have recently run this regression using Stata and the command biprobit. However, I am a complete newbie to statistics and I need some help...

    Started by jemma‎, 05-07-2015 02:47 AM
    • Replies: 0
    • Views: 135
    05-07-2015, 02:47 AM Go to last post
  30. Linear Regression - Influence of experience on wage

    Hello Talk-Stats-Members, i am new to the forum and already have a (in my eyes) complex theoretical problem that i hope you can help me with. I...

    Started by Michael_‎, 05-05-2015 02:37 PM
    • Replies: 4
    • Views: 237
    05-06-2015, 03:30 PM Go to last post
  31. Interpreting PROCESS Output

    Hi everyone, Does anyone know of any good resources to help interpret the process macro output, specifically for model 14? I have the book but it...

    Started by ck926‎, 05-06-2015 09:48 AM
    • Replies: 3
    • Views: 178
    05-06-2015, 10:11 AM Go to last post
  32. [SPSS - Logistic Regression] Resolve the linearity of logit assumption

    I am running a logistic regression and my income variable violates the linearity of the logit assumption. It is not negatively effecting the...

    Started by kdiallo11‎, 05-02-2015 03:37 PM
    linearity of logit, logistic regression, regression assumption
    • Replies: 3
    • Views: 242
    05-06-2015, 08:42 AM Go to last post
  33. RESET test Statistic

    Below is my question - I've never done a RESET calculation before so just seeking some guidance on how to start. I believe I need to add a quadratic...

    Started by dingo007‎, 05-05-2015 08:21 PM
    • Replies: 1
    • Views: 177
    05-05-2015, 10:13 PM Go to last post
  34. Thumbs up Normally/non-normally distributed data - initial significance testing

    Hi all, I would be grateful if anyone can direct me please. I am looking to 1. look at predictors of my DV (when controlling for confounders)...

    Started by HT3‎, 05-04-2015 11:23 AM
    • Replies: 1
    • Views: 155
    05-04-2015, 04:39 PM Go to last post
  35. optimal sample size

    I'm performing a regression analysis (OLS) and I have the luxury that my sample size is very high (5.000 observations) compared to the number of...

    Started by surveyman‎, 05-01-2015 04:27 AM
    • Replies: 6
    • Views: 275
    05-04-2015, 11:25 AM Go to last post
  36. Red face how to control foe age-wave1 when running a mixed model analysis

    Hi guys, I am running a linear mixed model in SPSS. My research question is: Does a reward-related personality trait at baseline predict weight...

    Started by fernandamata‎, 05-01-2015 06:57 PM
    mixed-model
    • Replies: 0
    • Views: 120
    05-01-2015, 06:57 PM Go to last post
  37. P-Values equal to zero

    Hi, I am running simple OLS regressions on forward and spot price data and have been getting p-values equal to exactly 0 (i.e. not 0.0000000234) for...

    Started by harleystats‎, 04-30-2015 09:56 PM
    p value, p values
    • Replies: 1
    • Views: 177
    04-30-2015, 10:05 PM Go to last post
  38. How to separate categorical variables in modeling

    Suppose I have a dataset as follows: Product Week Type Num times ad shown Purchases 1 2/2/13 young,old,hipster ...

    Started by lord12‎, 04-30-2015 10:32 AM
    • Replies: 0
    • Views: 139
    04-30-2015, 10:32 AM Go to last post
  39. Probit Regresion

    Hi all. What does categ.(factors) and count data mean in probit regression? Categ.(factors) mean covariate or something like that?

    Started by chivasrom‎, 04-30-2015 07:23 AM
    • Replies: 2
    • Views: 126
    04-30-2015, 07:51 AM Go to last post
  40. Logistic Regression: Classification table vs. Chi-square?

    Hello, I'm using binary logistic regression for my bachelor thesis (psychology). My problem is that the classification table does not change...

    Started by kazu‎, 03-27-2013 05:51 AM
    • Replies: 5
    • Views: 1,894
    04-30-2015, 04:31 AM Go to last post
  41. How can you deal with categorical variables that aren't present in your training set?

    Let's say I have the following linear regression: earnings = c0 + age * c1 + male * c2 where "male" is a categorical variable and "female" is...

    Started by billybass‎, 04-29-2015 06:24 PM
    • Replies: 1
    • Views: 155
    04-30-2015, 02:37 AM Go to last post
  42. Durbin-Watson

    Hi, Do I need to run a Durbin-Watson test if I am finding regressions for the number of second-language words learnt in a week based on age in...

    Started by becread95‎, 04-29-2015 09:12 AM
    • Replies: 0
    • Views: 159
    04-29-2015, 09:12 AM Go to last post
  43. 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: 305
    04-29-2015, 09:08 AM Go to last post
  44. 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: 272
    04-28-2015, 01:31 PM Go to last post
  45. multilevel modelling: predicting random effects for new clusters

    Hi: I have a query I'm hoping someone may be able to help with. I've chatted to a few people and looked at texts and the literature but haven't...

    Started by sigmundo‎, 04-24-2015 05:06 AM
    • Replies: 9
    • Views: 362
    04-28-2015, 11:13 AM Go to last post
  46. Dealing with violations of the assumptions.

    I thought I had this covered in detail, but if so I apparently lost it. When you discover you have non-normal residuals the first suggestion is...

    Started by noetsi‎, 04-21-2015 03:51 PM
    2 Pages
    1 2
    • Replies: 28
    • Views: 806
    04-28-2015, 07:47 AM Go to last post
  47. Interpret continuous variables in binary regression model

    I have produced three binary regression models, each showing the odds ratios (ORs) for an outcome (attendance versus non-attendance) Each...

    Started by jle‎, 04-26-2015 09:38 PM
    • Replies: 7
    • Views: 302
    04-28-2015, 01:58 AM Go to last post
  48. Difference-in-Differences(Evaluate effect of a policy implemented gradually)

    Hi I have to do a diff-in-diff estimator in order to evaluate the impact of the policy. The problem is that the policy is gradually implemented...

    Started by adrift‎, 04-25-2015 07:15 PM
    • Replies: 0
    • Views: 139
    04-25-2015, 07:15 PM Go to last post
  49. Problem with interpretation of regression coefficients

    Hi, I have problem with interpretation of regression coefficients. My regression function is: y = a + b1*x + b2*x^2 How can I interpret b1...

    Started by russel2000‎, 04-25-2015 08:04 AM
    • Replies: 5
    • Views: 249
    04-25-2015, 04:01 PM Go to last post
  50. Estimation with negative coefficients

    Hi, I have probably an easy problem, however I'm not really sure how to do it: Basically, I would like to estimate a linear regression with OLS. So...

    Started by InGoogleITrust‎, 04-25-2015 04:24 AM
    • Replies: 4
    • Views: 237
    04-25-2015, 09:57 AM Go to last post
  51. Standard or Hierarchical Regression?

    I would like to predict creativity (DV) through involvement (IV), after controlling for team size and gender. Questions 1) Do I use hierarchical...

    Started by funnyman‎, 03-16-2015 11:40 AM
    2 Pages
    1 2
    • Replies: 23
    • Views: 743
    04-22-2015, 03:06 AM Go to last post
  52. Stepwise Regression with solution limited to max # independent vars - Best approach?

    I am using MiniTab for stepwise regression. I have 25 independent variables I want to run through the stepwise procedure. However, I want the...

    Started by statburner‎, 04-21-2015 06:01 PM
    • Replies: 0
    • Views: 187
    04-21-2015, 06:01 PM Go to last post
  53. Regression analysis for periodic data

    I am working on a hedging model for commodity.I have past 36 months data of commodity market price and future contracts price. e.g. on 1st...

    Started by TheMonkster‎, 04-21-2015 01:29 AM
    • Replies: 0
    • Views: 140
    04-21-2015, 01:29 AM Go to last post
  54. Help calculating standard error of intercept

    Hi all, I'm running an equally weighted moving average multiple regression with 10 explanatory variables, and I'm looking at the change in alpha...

    Started by Karl Gustaf Karsten‎, 04-18-2015 08:58 AM
    • Replies: 5
    • Views: 377
    04-19-2015, 05:06 PM Go to last post
  55. Lousy model or case of complete separation...?!

    Hi! I'm struggling to get my model to fit my data through logistic regression in SPSS. I've got 3 categorical predictors: Behandl (yes/no)...

    Started by Singalore‎, 04-18-2015 07:46 AM
    • Replies: 0
    • Views: 135
    04-18-2015, 07:46 AM Go to last post
  56. DEA Analysis

    Hi, I'm currently looking for some materials on DEA Analysis. Do you guys have any e-books or good webpages on this topic? I seek a material...

    Started by JennyX28X‎, 04-09-2015 09:42 AM
    • Replies: 5
    • Views: 369
    04-16-2015, 06:57 AM Go to last post
  57. MLM (binary) Odds Ratio Interpretation

    In the following paper on MLM with a binary outcome: http://analytics.ncsu.edu/sesug/2014/SD-13.pdf It provides the following OR...

    Started by hlsmith‎, 04-15-2015 12:01 PM
    • Replies: 2
    • Views: 210
    04-15-2015, 01:08 PM Go to last post
  58. Problem - stationarity and relevance

    Hi all, I am doing my Bachelor's thesis at the moment and I ran into a problem I was hoping you could help me out with. While running my data...

    Started by irmax3‎, 04-15-2015 05:12 AM
    relevance, stationarity
    • Replies: 0
    • Views: 166
    04-15-2015, 05:12 AM Go to last post
  59. Averaging x and y before fitting regression model

    Hi everyone:wave::wave::wave: I have faced problem in my research when i fit a regression model my question is can i make moving average for...

    Started by abod1409‎, 04-14-2015 02:34 PM
    • Replies: 0
    • Views: 159
    04-14-2015, 02:34 PM Go to last post
  60. order determination sample size for autoregression

    Hi I am new to autoregression. I want to determine the order of an autoregression given a sample of size S1. I plan to use ordinary least...

    Started by debnathm‎, 04-13-2015 12:44 PM
    autoregressive, order determination, sample size
    • Replies: 0
    • Views: 192
    04-13-2015, 12:44 PM Go to last post

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