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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. 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: 1,898
    04-07-2015, 06:03 PM Go to last post
  2. 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: 2,096
    04-07-2015, 04:00 PM Go to last post
  3. 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: 1,664
    04-07-2015, 10:57 AM Go to last post
  4. 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: 1,977
    04-07-2015, 10:16 AM Go to last post
  5. 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: 2,270
    04-06-2015, 11:39 AM Go to last post
  6. 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: 1,181
    04-06-2015, 06:11 AM Go to last post
  7. 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: 2,010
    04-05-2015, 12:24 PM Go to last post
  8. 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: 1,881
    04-05-2015, 06:53 AM Go to last post
  9. 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: 1,072
    04-02-2015, 10:14 AM Go to last post
  10. 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: 1,702
    04-02-2015, 02:23 AM Go to last post
  11. 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: 2,408
    04-01-2015, 08:10 AM Go to last post
  12. 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: 911
    03-31-2015, 07:38 PM Go to last post
  13. 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: 1,211
    03-31-2015, 01:35 PM Go to last post
  14. 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: 3,071
    03-31-2015, 08:12 AM Go to last post
  15. 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: 1,055
    03-30-2015, 01:10 PM Go to last post
  16. 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: 2,266
    03-30-2015, 03:38 AM Go to last post
  17. 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: 936
    03-29-2015, 11:59 PM Go to last post
  18. 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: 2,318
    03-29-2015, 08:32 PM Go to last post
  19. 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: 1,259
    03-29-2015, 03:48 PM Go to last post
  20. 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: 1,187
    03-29-2015, 02:31 PM Go to last post
  21. 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: 1,605
    03-29-2015, 02:23 PM Go to last post
  22. 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: 1,455
    03-29-2015, 10:31 AM Go to last post
  23. 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: 3,285
    03-28-2015, 09:53 AM Go to last post
  24. 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: 1,161
    03-28-2015, 03:18 AM Go to last post
  25. 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: 1,240
    03-25-2015, 08:24 AM Go to last post
  26. 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: 1,160
    03-24-2015, 06:45 PM Go to last post
  27. 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: 1,364
    03-24-2015, 06:15 PM Go to last post
  28. 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: 2,804
    03-24-2015, 03:14 PM Go to last post
  29. 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: 1,353
    03-23-2015, 09:02 PM Go to last post
  30. 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: 1,014
    03-23-2015, 03:38 PM Go to last post
  31. 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: 1,056
    03-23-2015, 12:02 PM Go to last post
  32. 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: 1,548
    03-23-2015, 11:51 AM Go to last post
  33. 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: 2,010
    03-22-2015, 07:29 AM Go to last post
  34. 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: 2,063
    03-21-2015, 04:42 PM Go to last post
  35. [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: 1,015
    03-21-2015, 04:51 AM Go to last post
  36. 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: 1,620
    03-17-2015, 10:36 PM Go to last post
  37. 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: 2,329
    03-17-2015, 03:32 PM Go to last post
  38. 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: 2,423
    03-17-2015, 01:04 AM Go to last post
  39. 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: 1,392
    03-16-2015, 05:04 PM Go to last post
  40. 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: 3,439
    03-16-2015, 03:24 AM Go to last post
  41. 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: 1,778
    03-15-2015, 03:15 AM Go to last post
  42. 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: 1,271
    03-13-2015, 08:18 AM Go to last post
  43. 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: 1,102
    03-13-2015, 06:13 AM Go to last post
  44. 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: 2,719
    03-12-2015, 12:54 AM Go to last post
  45. 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: 3,240
    03-11-2015, 11:56 AM Go to last post
  46. 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: 1,413
    03-09-2015, 06:37 PM Go to last post
  47. 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: 1,573
    03-08-2015, 01:18 AM Go to last post
  48. 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: 2,483
    03-07-2015, 02:40 PM Go to last post
  49. 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: 1,419
    03-07-2015, 12:04 PM Go to last post
  50. 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: 2,384
    03-07-2015, 08:07 AM Go to last post
  51. 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: 1,574
    03-05-2015, 05:05 AM Go to last post
  52. 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: 1,095
    03-04-2015, 06:47 PM Go to last post
  53. 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: 1,568
    03-04-2015, 03:58 PM Go to last post
  54. 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: 1,546
    03-04-2015, 08:19 AM Go to last post
  55. 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: 1,528
    03-03-2015, 03:58 PM Go to last post
  56. 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: 1,297
    03-03-2015, 05:22 AM Go to last post
  57. 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: 1,729
    03-02-2015, 04:21 AM Go to last post
  58. 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: 1,648
    03-01-2015, 09:26 PM Go to last post
  59. 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: 1,400
    03-01-2015, 11:42 AM Go to last post
  60. 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: 1,842
    02-27-2015, 08:55 PM Go to last post

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