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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Conditional regression

    Hi all, I am trying to run explanatory regression: Y = alpha + Beta1*X*I{X.*Y>0}+Beta2*X*I{X.*Y<=0} where I{} is indicator function Since...

    Started by JustinasBr‎, 03-24-2012 05:35 PM
    conditional regression, dependent variable on rhs
    • Replies: 2
    • Views: 2,194
    03-24-2012, 05:49 PM Go to last post
  2. Conditional Regression Analysis in SPSS

    Hi all, I’m trying to do a matched paired analysis on some data. I have two groups of children, matched by age and sex. Each pair has been given a...

    Started by tommecrow‎, 02-23-2014 03:37 AM
    • Replies: 1
    • Views: 4,200
    02-23-2014, 04:09 PM Go to last post
  3. Conducting a White's test in SPSS

    PLEASE anyone?? I'm really struggling here... Hi everyone, I've seen a tutorial on youtube on how to conduct a white's test in spss. I was...

    Started by Charlotte_‎, 07-10-2015 05:02 AM
    • Replies: 1
    • Views: 6,083
    07-10-2015, 05:44 AM Go to last post
  4. confidence and prediction interval

    Let's say I have the following data: y: 19.695 77.310 138.938 16.382 36.249 111.078 9.497 61.270 42.804 52.931 x: 4.0860 8.6203 11.6592 3.6581...

    Started by macro90‎, 10-20-2005 02:58 AM
    • Replies: 1
    • Views: 9,740
    10-20-2005, 08:13 AM Go to last post
  5. confidence band from se in quadratic regression

    Hi, I have the following problem: I want to draw confidence band for a quadratic regression I have the model: y=a+b*x+c*x^2, i have...

    Started by pnouvellet‎, 11-25-2011 07:29 AM
    confidence interval, regression, standard error
    • Replies: 0
    • Views: 1,479
    11-25-2011, 07:29 AM Go to last post
  6. Confidence bands for a linear regression with X and Y errors

    Dear all, I have been searching for a while without finding a solution, so I hope someone here can help. Here is my problem: I have (X, Y)...

    Started by quentin.flm‎, 02-05-2016 09:23 AM
    • Replies: 5
    • Views: 1,545
    02-08-2016, 05:29 AM Go to last post
  7. 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: 1,158
    03-28-2015, 03:18 AM Go to last post
  8. confidence interval

    how do you find confidence interval ?

    Started by rka_stat‎, 04-19-2017 03:55 PM
    • Replies: 3
    • Views: 796
    04-20-2017, 07:49 PM Go to last post
  9. confidence interval and p value

    dialysis Odds Ratio Std. Err. z P>z logintercept .0001105 .0003682 -2.73 0.006 1.61e-07 .0756841 Dear , I am have...

    Started by tommyvcc‎, 02-23-2017 06:49 AM
    • Replies: 2
    • Views: 2,040
    02-23-2017, 08:30 PM Go to last post
  10. Confidence interval for coefficient of regression

    Hi, I dont understand how we can find the CI when we dont know what is n ? My question says. c) Assume that Se^2 =12.84 and V(β)= Se^2/(sumX^1)...

    Started by SadieKhan‎, 04-30-2011 02:19 PM
    • Replies: 2
    • Views: 2,906
    04-30-2011, 02:32 PM Go to last post
  11. Confidence Interval for Prediction in Weighted Regression

    Hi everyone, I'm currently writing my final year project in analytical chemistry, and have got to the stage of calculating confidence intervals...

    Started by skyllberg‎, 03-22-2009 12:39 PM
    • Replies: 0
    • Views: 5,717
    03-22-2009, 12:39 PM Go to last post
  12. Confidence interval of a delta-Rsquare

    Hello all, ¿Does someone know if there is any way to obtain the confidence interval (or the SE) of a delta-Rsquare when fitting a latent variable...

    Started by Holmes‎, 12-20-2013 06:06 AM
    • Replies: 0
    • Views: 1,248
    12-20-2013, 06:06 AM Go to last post
  13. Confidence Interval question

    Let me explain some background about my situation before I ask my question. I'm ultimately looking for some insight regarding how best to compute...

    Started by lancearmstrong1313‎, 09-11-2012 06:42 AM
    • Replies: 1
    • Views: 1,468
    09-15-2012, 11:26 PM Go to last post
  14. Confidence Interval With Regressed Logarithms

    I have converted 80 ("Count") pairs of X and Y to L10(X) and L10(Y) and performed a regression analysis. Assuming a valid correlation, I know I can...

    Started by cisaak‎, 12-12-2013 05:27 PM
    • Replies: 0
    • Views: 1,166
    12-12-2013, 05:27 PM Go to last post
  15. confidence interval/f-tests

    Basically Fe (iron) is the x variable/predictor, and MDD loss is the y variable/response in minitab. 1. I generated some data (regressoin...

    Started by gomes.‎, 02-21-2011 06:42 PM
    • Replies: 1
    • Views: 6,348
    02-23-2011, 01:01 PM Go to last post
  16. Confidence intervals comparison for linear and quadratic slopes?

    Hello, I am using regression analyses to evaluate changes in several different cognitive functions across the life span. In most cases, the...

    Started by IoMar‎, 06-08-2016 09:09 PM
    • Replies: 0
    • Views: 888
    06-08-2016, 09:09 PM Go to last post
  17. Confidence Intervals for Estimates in Multinomial Logistic Regression

    Hello all, Is there a way to calculate a confidence interval for the estimates occurances of a dependent variable when using multinomial logistic...

    Started by PsychResearcherRASIS‎, 02-07-2011 11:09 AM
    • Replies: 8
    • Views: 8,865
    06-05-2011, 03:51 PM Go to last post
  18. confidence intervals for linear regression

    Hi, newbie here, so please forgive the bad terminology. I started with ten years of historical data. I used Excel to give me a linear trendline and...

    Started by kins80‎, 01-10-2012 04:12 PM
    confidence interval, linear regression, trend analysis
    • Replies: 3
    • Views: 3,597
    01-11-2012, 09:13 PM Go to last post
  19. Confidence Intervals for predicted values

    Hu Guys, I hope you could provide hints to put me on the right track. A scholar has devised a device to measure the momentum of inertia (Mi) of...

    Started by gianmarco‎, 10-21-2013 05:02 AM
    • Replies: 10
    • Views: 4,216
    11-05-2013, 01:17 PM Go to last post
  20. confidence intervals in logistic regression with clusters

    Hi, this is probably a simple question but i hoped someone could explain it to me, I have carried out a logistic regression model assesing the...

    Started by nicklt‎, 01-10-2012 06:06 AM
    • Replies: 0
    • Views: 1,033
    01-10-2012, 06:06 AM Go to last post
  21. Confidence limits for logistic regression equation

    I have generated a logistic model for a disease status Y (unaffected-affected) using several independent variables on a very large (600K+) dataset. I...

    Started by slcjim‎, 03-21-2013 11:29 PM
    confidence intervals, logistic regression
    • Replies: 0
    • Views: 3,183
    03-21-2013, 11:29 PM Go to last post
  22. Confident intervals not so confident at all... what went wrong?

    I'm doing a linear regression analysis with 3 predictors and 76 cases. So far, everything is going smooth. R^2 = 0.95. So, I let SPSS calculate...

    Started by Junes‎, 02-22-2013 02:10 PM
    • Replies: 3
    • Views: 2,467
    02-22-2013, 04:48 PM Go to last post
  23. Confounder

    What if I see a 10% change (decrease) in an variable effect (X1 on Y) when including another variable (X2), though the effect of X1 is never remotely...

    Started by hlsmith‎, 08-13-2015 04:12 PM
    • Replies: 3
    • Views: 1,494
    08-16-2015, 11:16 AM Go to last post
  24. Confounder confounds at only one level of polytomous variable

    Hello! I have looked for a post on this but have been unsuccessful. It would be great if you could help. I am using logistic regression in SAS. ...

    Started by rkw‎, 04-16-2016 06:35 PM
    confounding, polychotomous, polytomous
    • Replies: 0
    • Views: 933
    04-16-2016, 06:35 PM Go to last post
  25. Confounding and rank of expanded design matrix

    Hello, If I have confounding with 1 defining equation two columns of the expanded design matrix are equal (blocks and the confounding factor). ...

    Started by mmstat‎, 02-11-2011 11:32 AM
    • Replies: 0
    • Views: 2,827
    02-11-2011, 11:32 AM Go to last post
  26. Confused about how to proceed

    Hi all, I have Y vectors = (0, 5, 10, 15, 20) At Condition1, x Vectors = (-0.0056, 5.0000, 10.0057, 15.0057, 20.0000) At Condition2, x vectors =...

    Started by hemnath‎, 09-26-2015 12:32 AM
    • Replies: 1
    • Views: 984
    09-30-2015, 02:51 AM Go to last post
  27. Confused about my Logistic Regression output (SPSS)

    Hi Guys, I've conducted a binary logistic regression using 2 categorical predictors (Static-moving and moving-static) and an outcome variable...

    Started by daveholja‎, 04-05-2016 08:12 AM
    • Replies: 4
    • Views: 1,226
    04-06-2016, 04:44 AM Go to last post
  28. confused trying to understand my SAS logistic regression output

    I am working on a public health masters thesis and need help trying to understand my SAS logistic regression output. I have a dataset of HIV cases...

    Started by greg30043‎, 09-27-2012 03:31 PM
    • Replies: 3
    • Views: 3,312
    09-28-2012, 05:09 PM Go to last post
  29. Confused: Mixed model, step-wise regression, testing for random effects

    Dear all, I want to perform a MLR (mixed model) on a data set (details below) that has both numeric and categorical explanatory variables. The...

    Started by Deccantraps‎, 08-30-2014 04:53 AM
    mixed model, mlr
    • Replies: 0
    • Views: 1,259
    08-30-2014, 04:53 AM Go to last post
  30. Confusing results after introduction of an interaction effect

    Found answers to my question. You can delete this topic.

    Started by Mruvka‎, 10-06-2013 11:24 PM
    • Replies: 0
    • Views: 1,177
    10-06-2013, 11:24 PM Go to last post
  31. Confusing statement on heteroscedasticity 1986 paper

    From Sefcik & Thompson's (1986) "An approach to statistical inference in Cross-Sectional Models with Security Abnormal Returns as Dependent...

    Started by derksheng‎, 08-04-2012 06:18 AM
    • Replies: 2
    • Views: 1,324
    08-05-2012, 06:57 AM Go to last post
  32. confusion about Ho/Ha hypothesis for simple/multiple regression

    The one thing I do not understand (and my book doesn't explain) is how do you determine if it's Ha > 0, Ha < 0 or Ha =/= 0? Anyone can shed some...

    Started by Parad0x‎, 12-04-2009 01:02 PM
    • Replies: 2
    • Views: 9,333
    12-08-2009, 08:14 PM Go to last post
  33. Confusion over how to calculate regression coefficient

    I'm trying to find the regression coefficient of one set of a data on another. There is a linear relationship between the two sets of data. After a...

    Started by paddyg‎, 06-15-2011 04:32 AM
    • Replies: 6
    • Views: 11,276
    06-22-2011, 01:33 PM Go to last post
  34. Question Confusion over the F-ratio in a hierarchical multiple regression

    Hey all, I'm not used to work with multiple regression analysis, so I would be glad if anyone could help me interpreting this result: I...

    Started by Comfort Eagle‎, 08-26-2013 03:43 AM
    f-change, f-ratio, hierarchical regression, multiple regression
    • Replies: 1
    • Views: 7,637
    08-26-2013, 09:33 AM Go to last post
  35. Consequences of wrongly applying dummy variables?

    I was just wondering if there were any consequences to applying dummy variables to independent variables which don't need it. For example, let's...

    Started by l_davies93‎, 08-10-2014 06:58 AM
    dummy-variable, regression
    • Replies: 0
    • Views: 1,202
    08-10-2014, 06:58 AM Go to last post
  36. Consistency of an estimator for nonlinear regression

    Dear all, It is stated e.g. in that to prove consistency of an estimator \hat{\theta}_n it is sufficient to prove that the true value ...

    Started by Jacov‎, 05-15-2012 08:21 AM
    • Replies: 1
    • Views: 1,609
    05-21-2012, 07:44 AM Go to last post
  37. Post Consolidation of items for regression analysis

    Hello everyone! I am a stats newbie and have a very basic question. Please forgive me if the question may seem too foolish. I wanted to conduct...

    Started by scooper23‎, 06-15-2016 08:31 PM
    • Replies: 1
    • Views: 1,349
    06-16-2016, 09:12 PM Go to last post
  38. Constant Elasticity Model

    I was wondering if anyone could please try to help me understand where I'm going wrong with the following logic: I have been trying to look at a...

    Started by Matpyris‎, 10-18-2012 09:59 AM
    constant elasticity, interpreting regression, power regression
    • Replies: 1
    • Views: 7,353
    10-23-2012, 09:31 AM Go to last post
  39. Constant in linear regression

    Hey guys, Need help in Linear regression: I have a dataset of 70 tumors that during resection we used an electric measurement to estimate a...

    Started by XPeriment‎, 06-05-2016 10:47 PM
    • Replies: 0
    • Views: 1,897
    06-05-2016, 10:47 PM Go to last post
  40. Constant negative fitted values...am I missing something?

    Hello all, I'm attempting to fit a model where y variable is a variety of $/ha/year figures (all positive) ranging between 0.01 and 2520. The...

    Started by samuelle‎, 08-04-2014 07:54 AM
    glm, linear, negative values
    • Replies: 2
    • Views: 1,370
    08-05-2014, 04:34 AM Go to last post
  41. Constant of 1: Why?

    I know that in regression (well any linear model I would assume; correct this if I'm wrong) models there's a constant of 1 added to the model. I've...

    Started by trinker‎, 09-19-2012 08:26 AM
    constant, regression
    • Replies: 7
    • Views: 3,033
    09-19-2012, 12:19 PM Go to last post
  42. Constant SE from covariance matrix on Multiple Regression

    Hi: I'm currently developing a Statistical package on Ruby, called statsample (http://ruby-statsample.rubyforge.org/), and I'm now working on...

    Started by clbustos‎, 02-18-2010 09:24 AM
    • Replies: 1
    • Views: 4,123
    02-22-2010, 01:47 AM Go to last post
  43. Constant Variable

    Hi folks, I was wondering if you could help me understand a problem I have with a regression. Basically, SPSS excludes one of my variables...

    Started by blastStu‎, 09-13-2010 03:58 AM
    • Replies: 2
    • Views: 17,664
    09-13-2010, 12:38 PM Go to last post
  44. Constrained OLS with Moore-Pseudoinverse?

    Hello, First of all - my first post here and I haven't found a way to enter formulas. So please excuse that I linked the wiki article instead. The...

    Started by animalfarm‎, 05-15-2014 02:38 AM
    • Replies: 0
    • Views: 1,760
    05-15-2014, 02:38 AM Go to last post
  45. Constructing Prediction Intervals for Forecasted Values in a Time Series

    I have a time series with 231 data points and the following descriptive statistics: Mean 75,231.66 Standard Error 969.98 Median 70,728.00 ...

    Started by David Lahar‎, 09-16-2013 03:16 PM
    • Replies: 3
    • Views: 5,626
    09-18-2013, 09:14 AM Go to last post
  46. consulting help needed (will pay)

    In about a month, I will be in need of help on some statistical analyses in the following areas: -categorical data analysis -multiple linear...

    Started by jediclampet‎, 02-19-2008 01:58 PM
    • Replies: 1
    • Views: 2,649
    08-12-2008, 02:41 PM Go to last post
  47. Continuous by contiuous interaction and non-linearity in OLS

    To whom it may concern: I am conducting an OLS for a class assignment and have an interaction between ADHD and non-delinquent peers. I have...

    Started by steph88‎, 05-02-2014 12:56 PM
    continuous variable, interaction, non-linearity, ols
    • Replies: 7
    • Views: 1,747
    05-02-2014, 01:44 PM Go to last post
  48. continuous dep variable with several indip dicotomic variables: which statistic?

    Hello there! I have to analyze these results: my dependent variable is continuous (blood levels of a substance) I have several indipendent...

    Started by Rerun‎, 09-01-2013 03:30 PM
    • Replies: 5
    • Views: 2,514
    09-04-2013, 08:30 AM Go to last post
  49. Continuous Moderator and DV and categorical IV (dummy coded) Help please!!!

    I ran an experiment recently and now I'm trying to work out whether either of the covariates (anxiety or avoidance) interact with the effect of any...

    Started by LoopyLou‎, 06-11-2012 10:55 AM
    • Replies: 1
    • Views: 4,303
    06-11-2012, 03:28 PM Go to last post
  50. Contribution of known values to a regression model

    Hello, Can anyone please tell me how I work out the contribution of known values make to a regression model using spss. For example I have a...

    Started by MJLANT‎, 04-19-2013 02:02 PM
    • Replies: 1
    • Views: 2,418
    04-19-2013, 02:42 PM Go to last post
  51. Contribution of multiple correlated effects on global observation

    Hello, In a perfect system, I have 0% of signal loss. I found that there are N effects that can contribute to signal loss. I activate each effect...

    Started by Cab‎, 08-04-2015 08:58 AM
    • Replies: 13
    • Views: 2,011
    01-05-2016, 11:35 AM Go to last post
  52. control for confounding variables using logistic regression

    Hello... I'm in a project to investigate the prevalence of intrusive thoughts in patients diagnosed with major depressive disorder and non-clinical...

    Started by vahid1990‎, 09-06-2015 08:34 AM
    • Replies: 6
    • Views: 1,870
    09-08-2015, 03:39 PM Go to last post
  53. Control Vairiables in Multiple regression

    Hi, I hope someone can help me. I need to run multiple regression with 2 IVs and 1 DV and include a control variables. The control variable is...

    Started by milehigh899‎, 06-06-2013 07:24 AM
    contol variables, regression
    • Replies: 12
    • Views: 2,487
    06-10-2013, 08:34 AM Go to last post
  54. Control variable correlated with binary treatment variable

    This question regards a social program evaluation which involves participants receiving a binary treatment that they self-select into. Some of these...

    Started by agsalomon‎, 12-24-2011 12:16 AM
    • Replies: 0
    • Views: 2,015
    12-24-2011, 12:16 AM Go to last post
  55. Control variable for panel analysis

    i am writing a paper analyzing What is the effect of corruption on Government expenditure (education,health,military and infrastructure). I have data...

    Started by arni‎, 12-16-2015 06:55 AM
    variable
    • Replies: 0
    • Views: 1,059
    12-16-2015, 06:55 AM Go to last post
  56. Control variables, what to do in practise

    I understand the theoretical use of control variables in regression analysis but when it comes to actually using them in practise i am stumped. Do...

    Started by finken‎, 12-17-2012 05:18 PM
    • Replies: 1
    • Views: 1,405
    12-17-2012, 05:31 PM Go to last post
  57. 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: 1,462
    06-28-2013, 01:11 PM Go to last post
  58. Controlling for a variable in multiple regression creates significance of another var

    I have continuous variables A, B and C. A/B correlates with C significantly. Neither A, B or A*B correlates significantly with C. In multiple...

    Started by trexter‎, 10-12-2016 03:56 AM
    • Replies: 1
    • Views: 882
    10-12-2016, 08:12 AM Go to last post
  59. Controlling for age in multiple regression?

    Please bear with me, I'm hopeless at statistics and so very lost right now. I'm wanting to run a multiple regression with 9 IVs and 1 DV. I want...

    Started by kk89‎, 07-26-2012 05:07 AM
    • Replies: 1
    • Views: 2,228
    07-27-2012, 12:32 PM Go to last post
  60. Controlling for group differences of no interest - regression, ANCOVA, neiter?

    Have been hunting around for a while and thought I ask here: Using SPSS, I have a continuous interval DV (test performace) and one four-level...

    Started by eeeparsnip‎, 02-09-2013 11:52 AM
    • Replies: 1
    • Views: 1,785
    02-11-2013, 04:09 PM Go to last post

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