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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Pearson correlation coefficient and Standard dev

    I know the basic interpretation of r. I.e., -1(<or =)r(<or=1). Critical values for n etc. However, while helping a research nursing student, her...

    Started by Joolz‎, 02-23-2016 09:02 AM
    • Replies: 0
    • Views: 379
    02-23-2016, 09:02 AM Go to last post
  2. Is this really independent

    I read an article today that made me wonder. They used linear regression to predict income at closure. One of their predictor variables was income...

    Started by noetsi‎, 02-22-2016 06:00 PM
    • Replies: 3
    • Views: 598
    02-22-2016, 09:33 PM Go to last post
  3. Ordinal predictors

    I know there was a thread on this. I could not find it. This is the type of issue that concerns me. These authors had an ordinal predictor that...

    Started by noetsi‎, 02-22-2016 11:44 AM
    • Replies: 8
    • Views: 693
    02-22-2016, 05:10 PM Go to last post
  4. Solving Multicollinearity Issues

    Dear Community, Currently I am modeling a multiple regression for a research project with Stata. I want to examine the influence of...

    Started by AntonR‎, 02-05-2016 09:53 AM
    • Replies: 11
    • Views: 1,236
    02-22-2016, 08:59 AM Go to last post
  5. Question Reporting results of nonparametric regression

    Hi! I am wondering how you present the results of non parametric regression test. I run the nonparametric regression using R, and the package np ...

    Started by nieve5552‎, 02-19-2016 08:51 PM
    nonparametric, regression, results, rstats, statistics
    • Replies: 1
    • Views: 695
    02-20-2016, 07:48 AM Go to last post
  6. Unhappy Help with Interactaction Assesment

    Hello! Can anyone explain why my Breslow-Day test for interaction was significant (p=0.0005) but my forward selection logistic regression test for...

    Started by Naxaris‎, 02-15-2016 07:58 PM
    • Replies: 7
    • Views: 894
    02-16-2016, 09:19 AM Go to last post
  7. Multiple Choice Question Answer

    Is there any materials with multiple choice answer for basic statistics? If yes, How can I get it?

    Started by Saroj Pokhrel‎, 02-16-2016 07:07 AM
    • Replies: 0
    • Views: 401
    02-16-2016, 07:07 AM Go to last post
  8. Lightbulb Multiple Regression to receive cost for a single item of an order

    Hi everybody, I appreciate any kind of help and tips: Problem: - I have a dataset with 1600 orders - For each of these orders I know the...

    Started by christoph_b‎, 02-03-2016 05:02 PM
    • Replies: 7
    • Views: 1,045
    02-15-2016, 04:29 AM Go to last post
  9. anova repeated measures with interaction term

    i hva been sitting here for 6 hours trying to figure out what i am doing wrong, but i cant figure it out. I am doing anova with repeated measures....

    Started by ama_nil‎, 02-12-2016 07:57 AM
    • Replies: 0
    • Views: 490
    02-12-2016, 07:57 AM Go to last post
  10. Effects of general participation and intensity of participation

    Exploring data from a quasi-experimental study, we want to investigate effects of general participation in a program (dichotomous; part_dich) aswell...

    Started by l.frei‎, 02-08-2016 05:30 AM
    general participation, participation intensity, quasi-experimental study
    • Replies: 5
    • Views: 1,023
    02-10-2016, 08:48 AM Go to last post
  11. Best way to treat integer/float column with null values in logistic regression

    Hi, I was wondering if anyone can assist me with this issue. I am building a logistic regression model to predict purchase or not purchase...

    Started by rodule‎, 02-04-2016 05:13 PM
    logistic regression, python, scipy
    • Replies: 1
    • Views: 520
    02-10-2016, 03:12 AM Go to last post
  12. Need Help for explain variables

    Hello Dear Members, I am doing a research on Corporate R&D and market capitalization with 5 variables. There in no co linearity between my study...

    Started by Usmanhcbf‎, 02-08-2016 02:08 AM
    • Replies: 3
    • Views: 707
    02-09-2016, 11:00 AM Go to last post
  13. Smile twoway ANOVA, post hoc test? New to statistics.

    This is probably easy, but this is new to me, hoping for some help here:tup:

    Started by ama_nil‎, 02-08-2016 05:44 AM
    anova, newbie
    • Replies: 1
    • Views: 571
    02-08-2016, 07:39 PM Go to last post
  14. 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: 703
    02-08-2016, 05:29 AM Go to last post
  15. Bayesian multiple regression issue in R

    I am attempting to generate a multiple regression model using JAGS on R and my results deviate substantially from MCMCregress and lm. I ran out of...

    Started by micdhack‎, 02-03-2016 05:09 PM
    • Replies: 0
    • Views: 487
    02-03-2016, 05:09 PM Go to last post
  16. Correlation for Binary Target Variable

    Hi, Just need someone to do a sanity for me. In linear regression, one might want to transform (log, power, etc...) a continuous independent...

    Started by Oberon‎, 02-03-2016 12:01 AM
    • Replies: 0
    • Views: 463
    02-03-2016, 12:01 AM Go to last post
  17. How do I test the significance of my correlation coefficients for various regressions

    Hi, I have a set of 25 points and I used a TI-84 calculator to calculate the linear, quadratic, logistic, exponential, and power regression models...

    Started by JohnDoeMath‎, 02-02-2016 11:10 AM
    correlation analysis, p-value, regression analysis, regression model, significance
    • Replies: 0
    • Views: 446
    02-02-2016, 11:10 AM Go to last post
  18. New Linear Regression Approach - Link Here

    My company has just released a free software download that eliminates known issues associated with traditional techniques. The InoraRAE has a simple...

    Started by OmniBear‎, 02-02-2016 10:42 AM
    linear, regression
    • Replies: 0
    • Views: 369
    02-02-2016, 10:42 AM Go to last post
  19. Should you use Bonferonni for regression

    It is common to generate many models in regression and only report the final one. To me this suggests that you should use some correction like...

    Started by noetsi‎, 01-30-2016 02:52 PM
    • Replies: 10
    • Views: 1,031
    02-01-2016, 10:37 AM Go to last post
  20. [R] Shapley values and relaimpo

    Hello everyone! Iíve been pondering this question for some time. Iíve searched online and on this forum and I havenít found the answer to my...

    Started by gheorghiu.alexandra‎, 02-01-2016 10:25 AM
    regression analysis, shapley value
    • Replies: 0
    • Views: 439
    02-01-2016, 10:25 AM Go to last post
  21. Correlation and regression

    Hello, it would be nice if you could provide the appropriate theoretical steps for the following task: There is a shop which also operates a pub....

    Started by DZ8‎, 01-30-2016 08:00 AM
    • Replies: 0
    • Views: 485
    01-30-2016, 08:00 AM Go to last post
  22. ANCOVA coding of categorical covariates

    Hello all, I am running an ANCOVA in R (Anova function) to assess the results of a randomized experimental study. I have a 2x2 full factorial...

    Started by Mark77‎, 01-28-2016 05:57 PM
    ancova, categorical covariates, gender
    • Replies: 0
    • Views: 482
    01-28-2016, 05:57 PM Go to last post
  23. Trend analysis / regression model with missing data

    Hi, I want to apply a Poisson GLM to count data, analyzing trends. However, there are missing counts (i.e. missing values in the outcome variable)...

    Started by mmercker‎, 01-26-2016 07:18 AM
    imputation, missing data, regression analysis, trend analysis
    • Replies: 8
    • Views: 938
    01-28-2016, 09:19 AM Go to last post
  24. Likert Scale Survey_regression analysis

    Dear all, I am new in this, so please help - I am conducting a survey for my thesis using Likert method. Through this research survey I would like...

    Started by Monjurul‎, 01-25-2016 09:47 AM
    • Replies: 13
    • Views: 1,074
    01-28-2016, 06:13 AM Go to last post
  25. Simple Linear Regression

    Dear Experts, Q1) In simple linear regression: a) Under what situations will the estimates b0 and b1 not be well-defined? b) What is the...

    Started by Tony_Danny‎, 01-27-2016 10:12 PM
    • Replies: 2
    • Views: 887
    01-27-2016, 11:17 PM Go to last post
  26. Regression following MANOVA results

    Hi Stats Gurus, This question is about a regression analysis that I want to run, but I am not too familiar with this type of analysis. I have...

    Started by jarbski2‎, 01-27-2016 11:54 AM
    manova, regression analysis
    • Replies: 5
    • Views: 593
    01-27-2016, 01:18 PM Go to last post
  27. Regression on Survey analysis across 50 states

    I ran a survey across all 50 states in the US. The goal is to see if there is a correlation between people's love for the state and the population...

    Started by vkredi‎, 01-26-2016 12:11 PM
    multilevel analysis, regression, regression analysis, survey, survey analysis
    • Replies: 0
    • Views: 852
    01-26-2016, 12:11 PM Go to last post
  28. Can I use multivariate analysis without univariate analysis?

    Dear all, I have a problem in my data analysis and paper writing. Some variables (dependents) were not statistically significantly correlated...

    Started by celinetang‎, 04-02-2013 05:39 AM
    • Replies: 14
    • Views: 16,677
    01-26-2016, 11:08 AM Go to last post
  29. Can AIC values be combined?

    Hello! I have hunted far and wide on the net in an attempt to answer this. Essentially, I'm trying to combine two AIC scores from different parts...

    Started by Alaska15‎, 01-26-2016 12:45 AM
    aic, combining models, growth curve, logistic regression, nonlinear regression
    • Replies: 1
    • Views: 672
    01-26-2016, 04:10 AM Go to last post
  30. Interpreting coefficients in pooled cross-sectional data with cluster-dummies

    Data: pooled cross-sectional data. 6 countries. 3 years of cross sectional data (10 year gaps in between), with different samples of individuals in...

    Started by Stropharia‎, 01-25-2016 10:15 PM
    cross-sectional, fixed effects model, regression coefficients
    • Replies: 0
    • Views: 455
    01-25-2016, 10:15 PM Go to last post
  31. What to do about violations of assumptions

    This is one example of a larger topic Say you are doing logistic regression and you have influential data points. You can't use robust regression...

    Started by noetsi‎, 01-25-2016 12:53 PM
    • Replies: 9
    • Views: 756
    01-25-2016, 06:01 PM Go to last post
  32. The Tobit Model

    Greatings for all, Suppose we are using the Latent Variable Formulation (i.e. not the Generalized Linear Modeling) for a multiple regression model...

    Started by Vivo Gharib‎, 01-25-2016 07:03 AM
    • Replies: 0
    • Views: 405
    01-25-2016, 07:03 AM Go to last post
  33. Positive definite issue with Likert data

    Hello, I ran my first data set through SPSS for a recent 5-point Likert questionnaire but am returning a "not positive definite" on the reduction. ...

    Started by jonwilliams‎, 01-24-2016 01:36 PM
    • Replies: 0
    • Views: 661
    01-24-2016, 01:36 PM Go to last post
  34. Which test for cont DV, 1 nominal IV (2 cat) + 1 nominal IV (4 cat) + 1 cont IV

    Hello, I am a bit struggling with choosing which test I should apply to my data. My dependent variable is continuous (participants could score...

    Started by Pernelle‎, 01-22-2016 06:26 AM
    • Replies: 4
    • Views: 1,023
    01-24-2016, 07:30 AM Go to last post
  35. Different signs

    Hello everybody: I have a litte problem interpreting my regression output. In the first regression, I have a continuous variable with a...

    Started by Student90‎, 01-23-2016 08:44 AM
    • Replies: 5
    • Views: 942
    01-24-2016, 05:09 AM Go to last post
  36. Ordinal Time-Series Dependent Variable

    I am attempting to run a regression with an ordinal DV that is panel/time series data. I only have SPSS and with the ordinal DV, it seems I should be...

    Started by COB1010‎, 01-23-2016 04:38 PM
    • Replies: 3
    • Views: 697
    01-23-2016, 05:00 PM Go to last post
  37. [R]: ROC curve after fitting a logistic model to a new datset

    Hello, I have fitted a Logistic Regression model (with 1 binary DV, and several IVs), and then I fitted it to a new dataset using the function...

    Started by gianmarco‎, 01-22-2016 08:24 AM
    • Replies: 5
    • Views: 630
    01-23-2016, 06:45 AM Go to last post
  38. fit an ARIMA-model with t -distributed innovation terms

    Hello, I have to fit an ARIMA-model with t -distributed innovation terms (skew-t) with software R. If I use arima function (package "stats") I...

    Started by cristal‎, 01-22-2016 10:41 AM
    • Replies: 0
    • Views: 459
    01-22-2016, 10:41 AM Go to last post
  39. Bounds for R2 in OLS regression?

    Context: From the big dataset Iím working with, my boss is somewhat curious (read skeptic) as for why fitting a multiple linear regression with...

    Started by spunky‎, 01-21-2016 07:57 PM
    • Replies: 1
    • Views: 489
    01-21-2016, 09:27 PM Go to last post
  40. Question Regression Type Estimation

    Hello, Attached is a time series data that has a plot of the percentage of breakdowns on a scheduled hours across the days. The objective is to...

    Started by Mukund‎, 01-20-2016 07:08 AM
    • Replies: 4
    • Views: 774
    01-21-2016, 09:06 AM Go to last post
  41. Regression with skewed data

    Our data is highly skewed, so much so that we routinely report median values not average ones in descriptive models. Now I am running regression with...

    Started by noetsi‎, 01-20-2016 05:02 PM
    • Replies: 3
    • Views: 959
    01-21-2016, 04:16 AM Go to last post
  42. Alternatives to ANCOVA? Unequal slopes.

    Hello, and thank you for your help on my question. My goal is to compare multiple groups to determine if a certain "variable of interest" is...

    Started by mgranatosky‎, 01-19-2016 11:04 PM
    • Replies: 5
    • Views: 760
    01-20-2016, 03:55 PM Go to last post
  43. Power analysis and sample size

    Hello all, I've used perused this site numerous times in the past for assistance with statistical issues, but this is my first post. I work with...

    Started by biosci1978‎, 01-19-2016 03:54 PM
    linear regression, power analysis, sample size
    • Replies: 0
    • Views: 356
    01-19-2016, 03:54 PM Go to last post
  44. Cant do a linear regression on a subset of my data: Error

    I installed the R package AER, from which you get the data `PSID1982`. Then I define this model: data("PSID1982") set.seed(15606) ...

    Started by Latriuz‎, 01-17-2016 11:53 AM
    • Replies: 0
    • Views: 419
    01-17-2016, 11:53 AM Go to last post
  45. Logistic model in overall population or in sub-population?

    Hello, I am not sure if this is the right place to ask my question. I really appreciate your help because I am really a beginner in bio...

    Started by johnstatistic‎, 01-15-2016 09:26 PM
    • Replies: 3
    • Views: 579
    01-15-2016, 11:01 PM Go to last post
  46. Comparing the outcome of two contingency tables

    Hi all, I have a data set for two different days. The treatments and outcomes are same but the assays were performed on two different days. I...

    Started by skgatx‎, 01-13-2016 09:31 PM
    • Replies: 4
    • Views: 578
    01-15-2016, 12:55 PM Go to last post
  47. How to test for difference between 2 R-Squared in Binary Hierarchical Regression?

    I ran a BINARY hierarchical regression in SPSS. However, I could not find an option to test change in R-Squared. So is there a way to test it in...

    Started by wannafly‎, 01-15-2016 09:18 AM
    • Replies: 3
    • Views: 655
    01-15-2016, 10:14 AM Go to last post
  48. Unimodal Link-function possible?

    Hi, using a GLM model (e.g. a Poisson regression), there are various link functions available in statistical packages. However, I don't find an...

    Started by mmercker‎, 01-08-2016 03:14 AM
    glm regression, link function, normal curve, probit
    • Replies: 6
    • Views: 769
    01-13-2016, 04:03 PM Go to last post
  49. Instrumental variable apporach: two stage least squares

    Hello everyone, I want to test cross sectional data with a household survey with 60k plus of respondents (however missing data result in overall...

    Started by Carlos_1‎, 01-11-2016 03:38 PM
    • Replies: 1
    • Views: 713
    01-11-2016, 08:05 PM Go to last post
  50. Help with linear regression when multiple subjects

    Hi, I have some data where each subject is presented with pairwise combinations of four test items (A, B, C and D). Each observation is a...

    Started by deeuu‎, 01-11-2016 06:01 AM
    linear regression, repeated measures
    • Replies: 0
    • Views: 545
    01-11-2016, 06:01 AM Go to last post
  51. Question Conceptual queries in modeling

    Hi all, I am from engineering background. I would require your help in certain conceptual questions in modeling. Your help would be greatly...

    Started by rags140684‎, 01-04-2016 01:34 AM
    logistic, modeling, p-value, regression, statistics
    • Replies: 2
    • Views: 830
    01-09-2016, 01:53 PM Go to last post
  52. Pleease help!? Filling in "blanks" in Regression Output

    Hello! Can someone please explain, I need to fill in the blanks marked They provide this info in a row: Coeff:-9074.674 Std.Err: ?? ...

    Started by Cold_w‎, 01-06-2016 03:26 PM
    p-value, regression analysis, standard error, stata, t-statistic
    • Replies: 9
    • Views: 1,599
    01-07-2016, 07:42 AM Go to last post
  53. Multiple Regression on Longitudinal AND Cross-sectional data

    Hello, I'm trying to make sure I'm doing a hierarchical multiple regression analysis correctly (and interpret the results correctly) with regards...

    Started by digestives‎, 01-05-2016 12:22 PM
    • Replies: 0
    • Views: 514
    01-05-2016, 12:22 PM Go to last post
  54. 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: 1,247
    01-05-2016, 11:35 AM Go to last post
  55. Can fixed effects models be used on cross sectional data?

    1) Does it make sense to use a fixed effects model on cross sectional data (note, not time-series cross sectional data) if the goal is to account for...

    Started by Stropharia‎, 01-04-2016 09:46 PM
    fixed effects regression
    • Replies: 0
    • Views: 591
    01-04-2016, 09:46 PM Go to last post
  56. Logistic Regression predicted probability is either 1 or 0 (or literally 2.2204E-16)

    I am doing a test logistic regression to predict whether employees will stay in the company for more than 3 years. After the model is trained, the...

    Started by Rizer‎, 01-01-2016 01:35 AM
    logistic regression
    • Replies: 11
    • Views: 1,793
    01-03-2016, 01:28 PM Go to last post
  57. Question Sample size

    I'm running a VAR model with five variables for the period 2000-2011. That's to say, 12 observations. I know the number of observations is small but...

    Started by siddig‎, 01-02-2016 11:40 AM
    • Replies: 2
    • Views: 582
    01-02-2016, 12:41 PM Go to last post
  58. Study Design for assessing efficacy of New Clinical Sign

    Hi! I am looking for some guidance as to what statistical tests I would need to do to know the significance of a study. The situation is this: ...

    Started by cielo‎, 01-02-2016 08:51 AM
    biostatistics, case control, clinical study, diagnostic test
    • Replies: 0
    • Views: 477
    01-02-2016, 08:51 AM Go to last post
  59. Logistic fixed effects cluster-specific interpretation with cross-sectional data

    I'm unsure how to interpret the output of a fixed effects (in the econometric sense) logistic regression model using cross-sectional data. I'm...

    Started by Stropharia‎, 01-01-2016 01:07 AM
    clustered data, fixed effects model, logistic regression
    • Replies: 0
    • Views: 696
    01-01-2016, 01:07 AM Go to last post
  60. Logistic Regression of NFL Data

    Week 5 picks from a logistic regression model for the NFL: http://trevorbischoff.com/nfl-2015-week-5-predictions/

    Started by LeeBalto‎, 10-07-2015 08:00 AM
    logistic regression, modeling, prediction
    • Replies: 8
    • Views: 2,852
    12-30-2015, 01:19 PM Go to last post

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