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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Regression analysis -- Sales & Advertising cost

    Am not a statistician ?? Can someone help me understand the Linear Regression & Multivariable regression ?? By considering the Sales as an...

    Started by sasken‎, 08-11-2013 11:42 AM
    • Replies: 1
    • Views: 1,279
    08-11-2013, 11:49 AM Go to last post
  2. help on a simple Q.

    Sorry for posting this basic Q. but I really do not seem able to wrap my mind around this "surprise" at least for me. the problem is as follows: I...

    Started by didig1‎, 08-03-2013 02:08 PM
    • Replies: 3
    • Views: 1,201
    08-11-2013, 06:39 AM Go to last post
  3. My Moderator is Group= can I still standardise it??

    Please help!! I am trying to do moderated regression after failed attempts at MANOVAs, and am having an issue with my moderator variable... I...

    Started by Lolly‎, 08-07-2013 07:45 AM
    • Replies: 4
    • Views: 1,398
    08-10-2013, 10:36 AM Go to last post
  4. Interpreting of hypothesis prediction after reversed relationship

    Dear Community, I am currently facing a big issue with regard to my master thesis. I developed following hypotheses: Hypothesis 1: Managers’...

    Started by esprit88‎, 08-10-2013 05:39 AM
    • Replies: 1
    • Views: 921
    08-10-2013, 09:54 AM Go to last post
  5. Hurdle models_accident data

    Hi, I am currently working on my dissertation which deals with rail accidents at level crossings. I am supposed to find out if the accidents can...

    Started by Snoopy41‎, 08-06-2013 08:14 AM
    • Replies: 2
    • Views: 1,633
    08-10-2013, 05:56 AM Go to last post
  6. Compare slopes of multiple regression models - repeated measures at mult conditions

    In an experiment I measured how hard (torque, dependent variable) subjects could push against a plate as it rotated at 4 speeds: stopped, slow,...

    Started by baxterj‎, 08-08-2013 02:12 PM
    • Replies: 3
    • Views: 2,522
    08-09-2013, 12:52 PM Go to last post
  7. Moderation - Which Variable?

    Hi, I am running moderation analysis using regression in SPSS. I have read that when you have a significant moderation interaction either of the...

    Started by LisaB‎, 08-06-2013 12:31 AM
    • Replies: 3
    • Views: 1,629
    08-08-2013, 09:28 AM Go to last post
  8. Moderation with a Categorical Moderator

    Hi guys, My proposed moderator is a categorical variable (group type) and I am unsure how to approach the analysis. I have only found examples...

    Started by Lolly‎, 08-08-2013 06:26 AM
    • Replies: 0
    • Views: 2,858
    08-08-2013, 06:26 AM Go to last post
  9. Explain the nonsignificance of simple slope analysis (with significant interaction)?

    Hi everyone, I need some help. In a study, I tested an interaction hypothesis and got a significant interaction result (p < .05) and visual...

    Started by lijiesjtu‎, 12-16-2011 08:55 AM
    • Replies: 4
    • Views: 4,474
    08-07-2013, 03:42 PM Go to last post
  10. Any good online lectures of time series introduction?

    Hello all: I'm looking to find "good" online videos that provide an introduction to time series analysis (some of the basics, applications....). ...

    Started by lancearmstrong1313‎, 08-05-2013 01:16 PM
    • Replies: 1
    • Views: 4,035
    08-05-2013, 01:50 PM Go to last post
  11. SEM - general applicability of analysis, variable aggregation, and data sufficiency

    Dear all, I just discovered this amazing forum and was wondering whether some of you may have answers for some questions I could not find any...

    Started by Yym‎, 08-05-2013 01:07 PM
    circular relationships, data sufficiency, general applicability, measurement model, structural equation model
    • Replies: 0
    • Views: 1,517
    08-05-2013, 01:07 PM Go to last post
  12. Binary Logistic SNAFU

    Hello, I'm curious if I have coded my variables incorrectly for an analysis. Here's a brief explanation: Independent variables: X1:...

    Started by biologyjoe‎, 08-03-2013 02:29 PM
    logistic regression, variable selection, wald test
    • Replies: 3
    • Views: 1,011
    08-05-2013, 10:22 AM Go to last post
  13. Struggling with regression analysis

    Hi guys, I'm new to stats and I'm new on here! I have a homework question that I do not understand. A multiple regression, 3 explanatory...

    Started by croddo‎, 08-04-2013 02:46 PM
    • Replies: 1
    • Views: 2,546
    08-04-2013, 04:42 PM Go to last post
  14. Interpretation equation Wald test when using Seemingly Unrelated Regression

    I am investigating the added value of commodities to a stock portfolio. Therefore, I use the Mean Variance Spanning test. Testing for spanning is...

    Started by rob1‎, 08-03-2013 04:54 PM
    • Replies: 0
    • Views: 3,658
    08-03-2013, 04:54 PM Go to last post
  15. Heckman 2 step procedure - how to formulate probit model for real estate?

    Dear all, I'm doing research on the attributes that determine listing prices of houses. Price is updated to the current date and independent...

    Started by RealEstate‎, 08-02-2013 05:57 PM
    2 step procedure, heckman, houses, probit, real estate
    • Replies: 0
    • Views: 2,874
    08-02-2013, 05:57 PM Go to last post
  16. Question Interpreting interaction between dummy IV and continuous moderator with log DV

    Hello Community, I urgently need your help to read the results of my regression analysis for my master thesis, which I need to hand in next week....

    Started by esprit88‎, 08-01-2013 04:19 PM
    continuous moderator, dummy, interaction effect, regression analysis
    • Replies: 13
    • Views: 3,283
    08-02-2013, 09:18 AM Go to last post
  17. Regression Equation : Looking for some help

    Hi buddies, I'm new here and trying to learn SPSS. To be honest, do not have good knowledge on it. looking for some help. Would really be thankful...

    Started by hadiur‎, 08-01-2013 05:06 PM
    regression analysis
    • Replies: 5
    • Views: 2,444
    08-01-2013, 06:47 PM Go to last post
  18. Interpreting multiple regression analysis

    Hello, I hope someone knows what the answer is to my question: I have a multiple regression analysis. Dependent variable is performance (time)...

    Started by people‎, 08-01-2013 06:50 AM
    • Replies: 5
    • Views: 1,729
    08-01-2013, 12:39 PM Go to last post
  19. New To Regression Analysis, Positive Beta should be negative?

    Hey everyone, new to the community and looking for some help. Would greatly appreciate any input you're able to offer! I'm currently in the...

    Started by ScientistBlah‎, 07-31-2013 03:54 PM
    • Replies: 5
    • Views: 2,719
    08-01-2013, 12:29 PM Go to last post
  20. Source for WLS Regression

    I'm working on a paper in which I run a study using a WLS regression methodology. I understand conceptually how it works and can run it easily in R....

    Started by elanmorin‎, 08-01-2013 11:10 AM
    regression, weighted least squares, wls
    • Replies: 0
    • Views: 974
    08-01-2013, 11:10 AM Go to last post
  21. Graphical Interpretation of an Interaction Effect

    Hello, I have included an interaction term in my regression and was hoping to graphically interpret it as my variables are continuous. I found a...

    Started by Spuz123‎, 08-01-2013 05:39 AM
    • Replies: 0
    • Views: 1,310
    08-01-2013, 05:39 AM Go to last post
  22. 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: 1,476
    08-01-2013, 02:36 AM Go to last post
  23. Validating regression models

    It is commonly suggested that you use part of the data to generate a model, and then use the rest of the data you withheld from creatng the model to...

    Started by noetsi‎, 07-30-2013 02:12 PM
    • Replies: 6
    • Views: 2,365
    07-31-2013, 09:13 PM Go to last post
  24. Time Series regression: No significance with increased sample size

    Hi there, I am running a time series regression with an equity markets returns as my dependent variable and a) oil prices, b) interest rate...

    Started by jamier‎, 07-31-2013 12:30 AM
    • Replies: 5
    • Views: 1,736
    07-31-2013, 10:25 AM Go to last post
  25. Time Series Analysis - Stationarity After a Point

    Hello, I am currently trying to model a time series to see if it becomes stationary after a certain number of time intervals (months). A simple...

    Started by forecastingfury‎, 07-30-2013 01:55 PM
    • Replies: 3
    • Views: 1,448
    07-30-2013, 02:43 PM Go to last post
  26. Regression Discontinuity

    Hi... I'm trying to define a model for estimating the impact of a political program (increase in user fees). I thought about using the RD since...

    Started by PedroR‎, 07-29-2013 03:53 PM
    • Replies: 7
    • Views: 2,249
    07-30-2013, 11:20 AM Go to last post
  27. Unhappy different times (different scores) but one regression

    Hi, Does anyone know how to do a regression analysis that incorporates data from 2 time points (same participants)? Up until now I have been...

    Started by Joeyr‎, 07-30-2013 06:37 AM
    • Replies: 0
    • Views: 1,234
    07-30-2013, 06:37 AM Go to last post
  28. Regression Residual

    Hi Guys, A question, something to do with knowledge of terminology as well in the application field. When we look at the returns of stocks and...

    Started by mavericksn‎, 07-29-2013 03:58 PM
    • Replies: 0
    • Views: 1,347
    07-29-2013, 03:58 PM Go to last post
  29. Interaction effect and model interpretation

    Hello all, Hoping someone can help with a model selection question... I'm testing the degredation rates of DNA (amount of error in...

    Started by lk9‎, 07-27-2013 07:56 AM
    • Replies: 5
    • Views: 2,613
    07-29-2013, 10:08 AM Go to last post
  30. HMR help needed

    Hello, we collected data from 50 people to investigate whether empathy is affected by age, loving poetry, speaking poetry, writing poetry, and...

    Started by kaka‎, 07-28-2013 02:51 PM
    • Replies: 0
    • Views: 949
    07-28-2013, 02:51 PM Go to last post
  31. Prediction interval of generalized linear models

    When doing predictions using a generalized linear model, how to get the prediction interval or prediction distribution? My model has a gamma...

    Started by Rekize‎, 07-27-2013 12:07 PM
    generalized linear model, prediction interval
    • Replies: 0
    • Views: 1,308
    07-27-2013, 12:07 PM Go to last post
  32. PLS HELP! Regression with non-normally distributed errors

    Hello Everyone, I'm desperatelly looking for help regarding an regression analysis I'd like to conduct. Apparently the residuals/error terms of...

    Started by CheersToStata‎, 07-26-2013 05:03 AM
    2 Pages
    1 2
    • Replies: 15
    • Views: 5,013
    07-26-2013, 02:51 PM Go to last post
  33. Unordered categorical variables and linear regression

    Hi everyone, I am new to this forum and still sort of a novice with regards to statistics. In my M.A. thesis I use one binary dependent...

    Started by Rasgal‎, 07-19-2013 10:19 AM
    • Replies: 5
    • Views: 3,729
    07-26-2013, 01:04 PM Go to last post
  34. Need some help mining.

    Hello all, This is my first post here. I have little stats experience and I may have bit off more than I can chew. I read around for a few hours...

    Started by cxavierc21‎, 07-24-2013 08:24 AM
    • Replies: 2
    • Views: 1,205
    07-26-2013, 08:50 AM Go to last post
  35. Wald chi-square test vs likelihood ratio chi-square test. Which to accept in Logistic

    Hi, I have an interesting problem I was hoping someone could offer me some advice with. I'm currently running binary logistic regression on...

    Started by Jonny123‎, 07-25-2013 09:34 PM
    • Replies: 0
    • Views: 2,835
    07-25-2013, 09:34 PM Go to last post
  36. Question when to perform a multiple regression test

    I have compared my treatment effect for the 4 variables to see which one was affected. Only one variable changed significantly pre vs. post. Can...

    Started by ApeWorld‎, 07-24-2013 06:44 AM
    • Replies: 10
    • Views: 2,414
    07-25-2013, 05:09 PM Go to last post
  37. Red face question about panel data and interaction terms

    Hi everyone, I'll try to keep this simple I am using 4 waves of panel data from a national longitudinal survey I'm trying to predict my...

    Started by monalisa09‎, 07-24-2013 11:11 PM
    • Replies: 1
    • Views: 3,092
    07-25-2013, 04:58 PM Go to last post
  38. Multi variabile time series analysis

    Hi guys, I am looking at a multi variate regression with time series data. I am basically looking at finding out the impact that oil prices (WTI...

    Started by jamier‎, 07-24-2013 02:38 PM
    • Replies: 5
    • Views: 1,727
    07-25-2013, 09:22 AM Go to last post
  39. Which one to use? Multiple Regression or Structured Equation Modeling

    I am in the process of writing my dissertation. I have a question about statistical method. My study is to analyze the factors that affect...

    Started by cozycorner‎, 07-24-2013 07:31 PM
    • Replies: 2
    • Views: 1,208
    07-25-2013, 09:14 AM Go to last post
  40. Interaction term in multiple regression with categorical variables

    Hello everybody, I have question concerning categorical variables and multiple regression: My Scenario: I have two independent categorical...

    Started by Baba‎, 07-25-2013 03:26 AM
    categorical vairable, interaction term, product, regression
    • Replies: 0
    • Views: 1,508
    07-25-2013, 03:26 AM Go to last post
  41. Unequal sample size among sub-groups: Effects on significance levels?

    Hello, I just came across a finding which I find somewhat strange: I conducted a quite simple multiple regression analysis in a dataset that...

    Started by szidel‎, 07-24-2013 01:04 AM
    regression; significance;
    • Replies: 6
    • Views: 5,385
    07-25-2013, 02:37 AM Go to last post
  42. Does vce(robust) correct not normally distributed errors (dependent variable)?

    Hello everyone, I have a question regarding the vce(robust) command in Stata. I have used this command for dealing with heteroskedasticity. I have...

    Started by CheersToStata‎, 07-24-2013 06:10 AM
    distribution, error term, vce(robust)
    • Replies: 0
    • Views: 1,318
    07-24-2013, 06:10 AM Go to last post
  43. Multivariate regression

    Hello, I am using SPSS 20.0 and am running a multivariate regression using the GLM...

    Started by rkeenan37‎, 07-23-2013 02:58 PM
    multivariate, regression, spss
    • Replies: 6
    • Views: 2,125
    07-24-2013, 12:31 AM Go to last post
  44. Unhappy Probit Analysis Help

    Can someone help on Probit analysis in the toxicity of Copper sulfate pentahydrate on brine shrimp? I am just a Hisg school student and I really...

    Started by RaphaelTan‎, 07-23-2013 06:59 AM
    probit
    • Replies: 3
    • Views: 1,791
    07-23-2013, 11:59 AM Go to last post
  45. Is my dependent variable both continuous and binomial?

    Hi all, I think my dependent variable is both continuous and binomial. To explain: My dependent variable is the time it takes for an individual...

    Started by Flicify‎, 07-23-2013 04:09 AM
    • Replies: 2
    • Views: 1,176
    07-23-2013, 09:18 AM Go to last post
  46. Scatter plot

    I created a scatter plot.. I am just wondering if I can say this is a monotonic? Thank you! :)

    Started by andre123‎, 07-16-2013 10:54 AM
    • Replies: 2
    • Views: 2,638
    07-23-2013, 07:47 AM Go to last post
  47. unusual experimental design

    Hi I recently did an experiment with two factors. The first factor is picture (nice vs ugly), the second factor is presentation type (picture vs...

    Started by sam_f‎, 07-16-2013 11:57 AM
    • Replies: 2
    • Views: 1,120
    07-23-2013, 06:36 AM Go to last post
  48. Estimating the demand function for a product

    Hi everyone! I have around 20 products with 30 monthly observations for each that I need to analyze. I have data on demand, normal price,...

    Started by nils88‎, 07-12-2013 06:02 AM
    discount, price elasticity, regression
    • Replies: 1
    • Views: 1,435
    07-23-2013, 05:40 AM Go to last post
  49. Small-sample bias adjustment AIC in SPSS for Multinominal Logistic Regression

    Hi everyone, New to the forum. My SPSS output for my nominal regression run does not include AICc in the Model Fiting Information table. It...

    Started by soloman‎, 07-19-2013 04:54 PM
    • Replies: 2
    • Views: 2,509
    07-22-2013, 07:48 PM Go to last post
  50. Appropriate Statistical Test

    just wondering what kind of test of statistical test i could do to test this: The data i have are all continuous variables (Coral Size (cm^2), Fish...

    Started by playdium‎, 07-20-2013 10:17 AM
    • Replies: 3
    • Views: 2,407
    07-22-2013, 01:23 PM Go to last post
  51. Statistical set data from 12 years

    Hi, i'm doing a quantitative analysis for my thesis. I've worked with spss to analyse surveys i conducted myself. But now i've got my data from...

    Started by hatsjie‎, 07-18-2013 02:27 AM
    • Replies: 12
    • Views: 1,953
    07-21-2013, 09:30 AM Go to last post
  52. Multiple questions about regression (in Stata)

    - What does it mean if my coefficient is negative while my constant is positive? - How do I add control variables in Stata? I have tried making a...

    Started by MMAR‎, 07-21-2013 06:35 AM
    • Replies: 0
    • Views: 1,516
    07-21-2013, 06:35 AM Go to last post
  53. log log regression

    When specifiying a model, is there a downside to logging the left hand variable, and logging only one right hand side variable assuming x1 is the...

    Started by royalstatus‎, 07-19-2013 09:07 PM
    • Replies: 1
    • Views: 1,463
    07-20-2013, 08:18 PM Go to last post
  54. Understanding coefficient of determination

    Hello everybody Im having some trouble understanding R^2. Almost everywhere, people describe it as the amount of the total variance in y that can...

    Started by RorschachDK‎, 07-16-2013 02:56 PM
    • Replies: 6
    • Views: 2,775
    07-20-2013, 07:12 AM Go to last post
  55. Help with odd MLR suppression example!

    I have quite a strange situation at hand that I am struggling to interpret: Fairly simple model in question, two continuous IVs, one continuous...

    Started by focusbob‎, 07-19-2013 10:04 AM
    • Replies: 3
    • Views: 1,314
    07-19-2013, 12:29 PM Go to last post
  56. Angry How to choose data for your regression

    Hi guys, I'm developing a statistical method to analyse a player's performance in tennis (annotation). To do this I need to decide on certain...

    Started by ianhargreaves80‎, 07-17-2013 12:22 PM
    2 Pages
    1 2
    regression analysis, spss
    • Replies: 16
    • Views: 4,431
    07-19-2013, 12:16 PM Go to last post
  57. Hglm

    Hi, I am trying to run an HGLM analysis with a 5-point Likert-type scale data set for the purposes of differential item functioning detection. ...

    Started by Gateway‎, 07-10-2013 03:59 PM
    • Replies: 2
    • Views: 1,900
    07-18-2013, 11:48 PM Go to last post
  58. 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: 2,373
    07-18-2013, 08:10 PM Go to last post
  59. 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: 1,279
    07-18-2013, 03:53 PM Go to last post
  60. 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: 2,113
    07-18-2013, 08:57 AM Go to last post

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