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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. 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: 1,820
    04-25-2015, 04:01 PM Go to last post
  2. 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: 1,396
    04-25-2015, 09:57 AM Go to last post
  3. 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: 6,250
    04-22-2015, 03:06 AM Go to last post
  4. 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: 1,369
    04-21-2015, 06:01 PM Go to last post
  5. 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: 1,783
    04-21-2015, 01:29 AM Go to last post
  6. 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: 6,445
    04-19-2015, 05:06 PM Go to last post
  7. 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: 993
    04-18-2015, 07:46 AM Go to last post
  8. 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: 2,056
    04-16-2015, 06:57 AM Go to last post
  9. 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: 1,788
    04-15-2015, 01:08 PM Go to last post
  10. 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: 1,045
    04-15-2015, 05:12 AM Go to last post
  11. 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: 2,121
    04-14-2015, 02:34 PM Go to last post
  12. 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: 1,791
    04-13-2015, 12:44 PM Go to last post
  13. Residuals in bivariate TLS regression

    Hi all, I'd like to calculate the Y-residuals from a TLS regression line: Y~X. Please take a look at the attached picture. Are the residuals of...

    Started by thom‎, 04-13-2015 09:52 AM
    • Replies: 0
    • Views: 1,158
    04-13-2015, 09:52 AM Go to last post
  14. Durbin-Watson statistic below 2, fixed effect model

    Hello I am asking for your advice. I am working with unbalanced panel data set. Sample contains data about 11 largest Finnish insurance companies,...

    Started by Runner‎, 04-11-2015 02:50 AM
    • Replies: 0
    • Views: 2,341
    04-11-2015, 02:50 AM Go to last post
  15. Data Normalization

    I have a problem that is challenging to me about fitting coefficient parameter. Here is the problem data (simple example) ...

    Started by wutao9999‎, 04-10-2015 12:30 PM
    • Replies: 1
    • Views: 1,763
    04-10-2015, 01:43 PM Go to last post
  16. PROC Means for dummy variables in SAS

    I have created a dummy variable in SAS, that in any given year takes the value 1 if both countries are members of the EMU and 0 otherwise in that...

    Started by JoLinda91‎, 04-10-2015 05:11 AM
    dummy variable, proc means, sas
    • Replies: 2
    • Views: 1,887
    04-10-2015, 11:54 AM Go to last post
  17. Force a regression coefficient to be negative

    I have a regression problem using variable X to predict Y. That is, Y = c + A*X + error. For the regression problem, we need that A must be...

    Started by wutao9999‎, 04-09-2015 09:15 AM
    • Replies: 4
    • Views: 2,369
    04-09-2015, 08:10 PM Go to last post
  18. Dummy variable for EMU countries

    Hello everyone :-) I have a dataset for 22 countries with 12 variables, where this two are important for this assigment: country1 Three-letter...

    Started by JoLinda91‎, 04-09-2015 12:51 PM
    • Replies: 0
    • Views: 1,876
    04-09-2015, 12:51 PM Go to last post
  19. Semivariogram and kriging

    Hello All, I am having problem with semivariogram. Say, there is three points (1,4),(2,1),(3,3). The results at this points are 50, 40 ,25. I want...

    Started by niloy112‎, 04-08-2015 08:43 PM
    • Replies: 0
    • Views: 1,420
    04-08-2015, 08:43 PM Go to last post
  20. Help with a Poisson Regression Equation

    I have attached an image of an equation of Poisson Regression that i am working on for my data analysis project. I want to understand it a bit as i...

    Started by rushan‎, 04-08-2015 05:39 AM
    • Replies: 1
    • Views: 1,611
    04-08-2015, 07:00 AM Go to last post
  21. SSE and b1 are independent? How can I prove that?

    at simple linear regression, are b1 and SSE independent. but how can i prove that? :confused: my text book said 'SSE is independent of each of...

    Started by Silverstar‎, 04-08-2015 03:41 AM
    regression, regression analysis, sse
    • Replies: 0
    • Views: 1,538
    04-08-2015, 03:41 AM Go to last post
  22. Smile Cox/ Binomial Regression: How to reconcile Non-significant model with significant IVs

    Hello I'm been performing some survival and regression analyses corresponding to an event of interest being death or a certain surgical procedure,...

    Started by illmatic_statistic‎, 04-06-2015 06:15 PM
    binomial logistic regress, cox regression, interpreting regression, wald test
    • Replies: 2
    • Views: 2,044
    04-07-2015, 06:03 PM Go to last post
  23. Stepwise Regression Help

    Hi, Statistics is not my strong suit and I could really use some help. I'm wondering if it is possible to do a stepwise regression with 9 IVs on...

    Started by Perpetua‎, 04-07-2015 04:00 PM
    • Replies: 0
    • Views: 2,233
    04-07-2015, 04:00 PM Go to last post
  24. Regression Analysis and Residual analysis from Minitab output

    The questions are on Regression and Analysis and Residuals. I need some explaining oh how to find and answer these questions just from a minitab...

    Started by bobbycontinelli‎, 04-07-2015 10:57 AM
    • Replies: 0
    • Views: 1,781
    04-07-2015, 10:57 AM Go to last post
  25. Regression help

    I ran a regression of event sales (y) and advertising spending (x). I got the following results: Correlation: .055 R2: .003 N: 438 y = 1.28x +...

    Started by Robk1015‎, 04-07-2015 07:36 AM
    • Replies: 6
    • Views: 2,108
    04-07-2015, 10:16 AM Go to last post
  26. Regression analysis

    Hi all. Could I use linear regression with not normal distributed variable?

    Started by RealBG‎, 04-03-2015 11:30 PM
    • Replies: 6
    • Views: 2,401
    04-06-2015, 11:39 AM Go to last post
  27. Multiple variable regression(BUT only one coefficient to be estimated)

    Dear, For our master thesis we need to regress the equation Pt-P(t-1)= S/2*(Qt-Q(t-1))+Beta*S/2*(Qt-1)+et or http://prntscr.com/6q81o8 It...

    Started by Arno050‎, 04-06-2015 06:11 AM
    • Replies: 0
    • Views: 1,275
    04-06-2015, 06:11 AM Go to last post
  28. Validation for prognostic marker

    Dear All, I am completely lost in the area of statistics. I have a dataset of 265 cancer patients with a novel protein marker as well as the known...

    Started by ambinlab‎, 04-03-2015 01:37 AM
    • Replies: 3
    • Views: 2,207
    04-05-2015, 12:24 PM Go to last post
  29. Regression

    When performing regression analysis on excel with data that has been condensed, should you expand the data before creating the analysis table. For...

    Started by Thebluesclues‎, 04-05-2015 06:44 AM
    • Replies: 1
    • Views: 1,990
    04-05-2015, 06:53 AM Go to last post
  30. Need Help on this question about Ratio of two parameters

    I need help on this question: Suppose we have two independent samples from one population: Global Sample(Xg,Yg) and Local Sample(Xl,Yl) And we...

    Started by mahdi‎, 04-02-2015 10:14 AM
    calibration, regression analysis, regression help
    • Replies: 0
    • Views: 1,152
    04-02-2015, 10:14 AM Go to last post
  31. How to find Significant difference in R2

    Hi My study requires comparing the regression square got from accounting policy 1 and from accounting policy 2. Same set of samples are used in...

    Started by CAShobana‎, 04-02-2015 02:23 AM
    • Replies: 0
    • Views: 1,857
    04-02-2015, 02:23 AM Go to last post
  32. Fisher r to z transform / significance test for two different values of r^2

    Short version: I have two values of r^2 from Pearson's correlation, one from a control group (.713) and one for an experimental (.527), and I would...

    Started by biosciguy‎, 04-01-2015 01:11 AM
    correlation coefficient, fisher's z-transformed, r language, r-squared
    • Replies: 1
    • Views: 2,575
    04-01-2015, 08:10 AM Go to last post
  33. Does rate of change in proportion variable depend on ranked independent variable?

    I am doing an analysis on the prevalence of a drug resistance mutation in a particular country and how prevalence changed over time. Samples were...

    Started by bushmanm‎, 03-31-2015 07:38 PM
    • Replies: 0
    • Views: 969
    03-31-2015, 07:38 PM Go to last post
  34. Interaction terms with non-signficant main effects

    I am using a logit model to do the analysis on my dissertation data. 2 of the variables interact, so I have an interaction term. My question is 2...

    Started by smk2121‎, 03-31-2015 08:19 AM
    interactions, logit model, main effect
    • Replies: 2
    • Views: 1,319
    03-31-2015, 01:35 PM Go to last post
  35. Finding the population mean from a sample

    For a quiz, the question I was given is "Estimate the mean weekly gross sales for all stores that spend $800 on direct mail advertising (Independent...

    Started by Thebluesclues‎, 03-31-2015 01:46 AM
    • Replies: 1
    • Views: 3,526
    03-31-2015, 08:12 AM Go to last post
  36. Timeseries: Evaluating Var models

    I have build some var models with different types of variables and now I want to try to evaluate them and see wich one is the best But when I look...

    Started by studentbelg‎, 03-30-2015 01:10 PM
    • Replies: 0
    • Views: 1,135
    03-30-2015, 01:10 PM Go to last post
  37. Logistic Regression model: a significant predicting variable with low sensitivity?

    Hi fellow forum members! Thank you in advance for your time! I used binary logistics regression (SPSS) to determine the relationship between...

    Started by VioV‎, 03-29-2015 06:25 PM
    continous variable, logistic regression, predictor, sensitivity, specificity
    • Replies: 1
    • Views: 2,469
    03-30-2015, 03:38 AM Go to last post
  38. Which test to use (f or t) to test the validity of Okun's Law

    Hello, I'm doing a simple linear regression on Okun's law and I need to do a statistical test on the validity of my model. I have two variables;...

    Started by econmajor123‎, 03-29-2015 11:59 PM
    • Replies: 0
    • Views: 1,004
    03-29-2015, 11:59 PM Go to last post
  39. How to compare 2 ORs from different regression models.

    I created a logistic regression model to predict an outcome of depression vs. no depression. There are several variables in the model including...

    Started by ResearchMaven‎, 03-29-2015 03:07 PM
    compare, logistic regression, odds ratio
    • Replies: 2
    • Views: 2,423
    03-29-2015, 08:32 PM Go to last post
  40. Panel data ??

    Hi, I want to knwo if an historic of 8 years is good enough for using the panel data model with 25 country ?

    Started by Ihssanee‎, 03-29-2015 03:48 PM
    • Replies: 0
    • Views: 1,348
    03-29-2015, 03:48 PM Go to last post
  41. Tolerable Serial Correlation/ Auto-Correlation by a Regression Analysis

    Hi, is there a similar rule for the tolerable serial correlation/ auto-correlation by a regression analysis like the maximum-minimum quotient...

    Started by consuli‎, 03-29-2015 02:31 PM
    • Replies: 0
    • Views: 1,267
    03-29-2015, 02:31 PM Go to last post
  42. Tolerable Heteroskedasticity/ Variance Inhomogenity

    Hello, a long time ago I have read somewhere, that a regression can overcome heteroskedasticity/ variance inhomogenity up to certain amount. It...

    Started by consuli‎, 03-26-2015 07:28 AM
    • Replies: 2
    • Views: 1,681
    03-29-2015, 02:23 PM Go to last post
  43. Question p value of the constant, can I ignore it?

    I'm analysing the influence of various factors on hare harvests in a specific are. E.g. How do the hare harvests change when the fox harvests...

    Started by sumie‎, 03-29-2015 09:44 AM
    p-value, regresion
    • Replies: 1
    • Views: 1,604
    03-29-2015, 10:31 AM Go to last post
  44. Discretization of a continuous variable

    He guys, I'm analyzing a research regarding patients and their risk factors for developing a certain side effect. If i enter age as a continous...

    Started by XPeriment‎, 03-26-2015 06:05 AM
    • Replies: 14
    • Views: 3,480
    03-28-2015, 09:53 AM Go to last post
  45. Confidence for pooled within group slope

    In SPSS simple linear regression one can get the confidence limits either side of the linear regression slope simply by ticking the "prediction...

    Started by Stephen19‎, 03-27-2015 11:13 AM
    • Replies: 2
    • Views: 1,218
    03-28-2015, 03:18 AM Go to last post
  46. Regression with several mediators

    Hello there :) Although this is connected to SPSS; I think this is the more appropriate place. Im making a linear regression and have several...

    Started by LtStarbuck‎, 03-25-2015 08:24 AM
    • Replies: 0
    • Views: 1,280
    03-25-2015, 08:24 AM Go to last post
  47. Approaches for multivariate nonlinear parametric regression?

    I have some data that is nonlinear, but is curvilinear. It is two factors and a dependent variable. Each factor has a pretty good fit when applying a...

    Started by stevehollx‎, 03-24-2015 12:50 PM
    • Replies: 1
    • Views: 1,247
    03-24-2015, 06:45 PM Go to last post
  48. Logistic regression using dummies with dependent "holes"

    Hi, I'm trying to do do a logistic regression using R. I want to regress using binary dependent variable Y as granted or not grated (1 or 0)...

    Started by Elekko‎, 03-24-2015 06:15 PM
    dummy variable, interactive dummy, logistical regresion, missing value
    • Replies: 0
    • Views: 1,524
    03-24-2015, 06:15 PM Go to last post
  49. Controlling mediation effect in a binary logistic regression

    Hi everbody, It's my first post and I hope I posted in the right forum. In my master thesis I use binary logistic regression: a dichotomous...

    Started by Frodofroehlich‎, 03-24-2015 01:19 PM
    • Replies: 2
    • Views: 2,942
    03-24-2015, 03:14 PM Go to last post
  50. Generalized Linear Mixed Models without mixed effects. A meaningless question?

    Hi there, I know what fixed and random effects in linear models or GLM are. I am using Generalized Linear Mixed Models (GLMM) to handle this. So...

    Started by eric1708‎, 03-23-2015 09:00 AM
    fixed effect, glmm, random effect, terminology
    • Replies: 3
    • Views: 1,431
    03-23-2015, 09:02 PM Go to last post
  51. MLE and vector generalized linear models

    Hello and thank you very much for your time I am working to simultaneously (multivariate) regress 'A' and 'B' parameters from matched observations...

    Started by smalley2‎, 03-23-2015 03:38 PM
    • Replies: 0
    • Views: 1,113
    03-23-2015, 03:38 PM Go to last post
  52. relation within Gauss-Newton method for minimization

    If we study model fit on a nonlinear regression model Y_i=f(z_i,\theta)+\epsilon_i, i=1,...,n, and in the Gauss-Newton method, the update on...

    Started by ianchenmu‎, 03-23-2015 12:02 PM
    optimization
    • Replies: 0
    • Views: 1,123
    03-23-2015, 12:02 PM Go to last post
  53. 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: 1,663
    03-23-2015, 11:51 AM Go to last post
  54. 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: 2,133
    03-22-2015, 07:29 AM Go to last post
  55. 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: 2,204
    03-21-2015, 04:42 PM Go to last post
  56. [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: 1,083
    03-21-2015, 04:51 AM Go to last post
  57. 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: 1,687
    03-17-2015, 10:36 PM Go to last post
  58. 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: 2,508
    03-17-2015, 03:32 PM Go to last post
  59. 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: 2,573
    03-17-2015, 01:04 AM Go to last post
  60. 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: 1,502
    03-16-2015, 05:04 PM Go to last post

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