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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. P-value for a regression where expected slope is 1:1

    Hi, I am comparing two values for vegetation cover from two time periods. The expected value is y=x for the slope. I am curious how to calculate a...

    Started by drm258‎, 11-23-2016 07:09 PM
    • Replies: 6
    • Views: 431
    11-26-2016, 09:40 AM Go to last post
  2. Repeated measures question

    Hello. I have taken day to day repeated measures in number of predictor variables as well as some other ordinal dvs. I want to meaure the effect of...

    Started by LEMONIAS‎, 11-20-2016 06:56 PM
    • Replies: 4
    • Views: 455
    11-24-2016, 12:39 PM Go to last post
  3. Least squares estimate of alpha and beta

    My group have different opinions towards the following question: Find the least squares estimate of alpha and beta of the mechanistic growth...

    Started by acc_aac‎, 11-24-2016 05:02 AM
    nonlinear regression
    • Replies: 1
    • Views: 270
    11-24-2016, 10:23 AM Go to last post
  4. How to compute r squared in linear mixed model

    It's kind of urgent. i need to hand out my thesis in 3 days from now :/ Can someone explain me how to computer r squared in linear mixed model? i...

    Started by tal_spi‎, 11-24-2016 10:11 AM
    • Replies: 0
    • Views: 214
    11-24-2016, 10:11 AM Go to last post
  5. Standard Regression Analysis / urgent help for stats beginner.

    Hi Guys! I'm fairly new to statistics and am conducting a standard regression analysis with 1 predictor variable ( following from a pearsons...

    Started by Valeriosmith‎, 11-22-2016 06:50 AM
    • Replies: 5
    • Views: 305
    11-22-2016, 12:57 PM Go to last post
  6. Nominal vs. Ordinal

    Say i'm using age groups which are not equal in size and interval (1-2,2-4,5-8years) is it better when using a regression model to set this variable...

    Started by avisev‎, 11-20-2016 04:47 PM
    • Replies: 3
    • Views: 321
    11-21-2016, 04:40 PM Go to last post
  7. Poission with random effects

    Hi, I have two levels in my poission regression model with random effects (children and family level) which predicts count data after i get the...

    Started by avisev‎, 11-20-2016 04:37 PM
    • Replies: 0
    • Views: 215
    11-20-2016, 04:37 PM Go to last post
  8. Help with multilevel multinomial logistic regression and missing data

    Hi all - I would really appreciate some thoughts/advice. I'm working with survey data containing individual responses nested within a number of...

    Started by mattas‎, 11-16-2016 04:42 PM
    • Replies: 0
    • Views: 433
    11-16-2016, 04:42 PM Go to last post
  9. Insignificant interaction effect in regression vs. scatterplot indicating interaction

    Hallo, I'm new to this forum and hope I can make my problem clear. I conducted a multiple regression analysis to, among other things, test the...

    Started by Norbert22‎, 11-16-2016 09:41 AM
    • Replies: 1
    • Views: 244
    11-16-2016, 10:46 AM Go to last post
  10. Exclamation What experimental design would be most appropriate?

    In my study I have two study groups: Group A is composed of X subjects which are either males or females, and every subject is characterized by...

    Started by sylnyapi‎, 11-15-2016 01:18 PM
    • Replies: 0
    • Views: 250
    11-15-2016, 01:18 PM Go to last post
  11. logistic regression or survival analysis?

    Hello, I have two main questions that I hope you help me answer. Let me give you the scenario first. Let’s say that some students in a school are...

    Started by Marvin85‎, 11-14-2016 04:44 PM
    controlling for time, survival analysis, time post
    • Replies: 4
    • Views: 356
    11-15-2016, 10:41 AM Go to last post
  12. Question How to parameterize this crazy data?

    So, a colleague of mine, who is a survey methodologist, is proposing to do an experiment on a survey. * The purpose of the experiment is to see...

    Started by SabbyATL‎, 11-14-2016 07:00 PM
    parameterization
    • Replies: 0
    • Views: 225
    11-14-2016, 07:00 PM Go to last post
  13. Post-Hoc Power Analysis (G*Power) for simple linear regression

    Hey everyone! I conducted a simple linear regression with non-significant results. Now I would like to analyze the power of this calculation using...

    Started by nziza‎, 11-11-2016 07:00 AM
    effect size, g*power, post-hoc, power analysis, simple linear regression
    • Replies: 0
    • Views: 355
    11-11-2016, 07:00 AM Go to last post
  14. Thumbs up Exam pass rate analysis

    Hi, looking for some help with some analysis I am looking at on Minitab for exam pass marks. I have a data set which shows global student...

    Started by iannimmo‎, 11-10-2016 11:38 AM
    • Replies: 1
    • Views: 282
    11-10-2016, 11:47 AM Go to last post
  15. Have 4 dependent and 10 independent variables - which test should I use?

    Hi all, I'm interested in the potential effects of water pollution on feather color of a bird. For this, I calculated 4 color variables for each...

    Started by NatL‎, 11-09-2016 04:47 PM
    dbrda, linear regression, multivariate analysis, permanova, ridge regression
    • Replies: 0
    • Views: 275
    11-09-2016, 04:47 PM Go to last post
  16. please help me make sense of my multilevel linear regression [R]

    Hi everyone, I'm trying to wrap my head around multilevel (or mixed-effect) models, but not quite succeeding. I have the following data from a...

    Started by Junes‎, 11-07-2016 03:46 PM
    multilevel
    • Replies: 0
    • Views: 290
    11-07-2016, 03:46 PM Go to last post
  17. Correlation with residuals of regression

    Hi all, Let's say I have one DV (X) and 5 IV's, A, B, C, D and E. I'm specifically interested in the effect of E. I could perform a regression...

    Started by AnLo‎, 11-04-2016 09:07 AM
    • Replies: 3
    • Views: 362
    11-07-2016, 10:18 AM Go to last post
  18. Red face Test for comparing correlation values. The winner is?

    Hi everyone, my problem is relatively simple, but trivial. I've already read some topics about that, but I really need straightforward answers...

    Started by smndpln‎, 11-05-2016 05:36 AM
    compare coefficients, correlations, neurosciences, regression analysis
    • Replies: 2
    • Views: 379
    11-05-2016, 07:10 AM Go to last post
  19. Urgent: SPSS multiple regression moderator analysis

    Hello everybody, I am glad I found my way to this forum! There seem to be a lot of SPSS pros here! :) I hope I can learn a bit! I am currently...

    Started by PhilST‎, 11-02-2016 01:04 PM
    • Replies: 3
    • Views: 435
    11-03-2016, 04:32 AM Go to last post
  20. Calculating predicted probabilities from a logistic regression model SPSS

    Hello everyone, I am trying to calculate individual predicted probabilities from a logistic regression model with SPSS (to describe how a individual...

    Started by kranas‎, 10-30-2016 01:08 PM
    logistic regression, probabilities
    • Replies: 6
    • Views: 505
    11-01-2016, 04:52 PM Go to last post
  21. Calculation of parameter uncertainties when using method of least squares

    Hi everyone, I am struggling with a maybe simple problem. I have a set of data points (x,y) for which I would like to derive a fitting function of...

    Started by bordercollie2‎, 07-29-2016 05:59 AM
    • Replies: 1
    • Views: 395
    11-01-2016, 05:41 AM Go to last post
  22. Multinomial regression: how to interpret results

    Hello Everyone, I'm currently writing my master's dissertation and i'm having two main issues. 1) The first one is related to the attached...

    Started by GiuliaCarbone‎, 10-30-2016 04:41 PM
    • Replies: 4
    • Views: 343
    10-31-2016, 02:57 PM Go to last post
  23. Help with my hierarchal regression

    Hi Guys I'm accomplishing a hierarchal regression for my thesis and I'm a bit stumped. My hierarchal regression is trying to assess the link...

    Started by lewiss009‎, 10-22-2016 10:05 AM
    • Replies: 3
    • Views: 376
    10-30-2016, 02:51 AM Go to last post
  24. bootstrap regression question

    I have a slightly different twist on the normal application of bootstrapping and regression. Here’s the problem… I have a population of people...

    Started by signalMTB‎, 10-19-2016 09:48 PM
    • Replies: 1
    • Views: 319
    10-28-2016, 09:09 AM Go to last post
  25. Forecast Analysis Inquiry

    Im trying to perform some time series analysis on 2015 and 2016 monthly recorded data to see what method is best for forecasting 2016 monthly values...

    Started by lokelyokel‎, 10-26-2016 09:09 AM
    forecast, forecast error, regression analysis, winters method
    • Replies: 0
    • Views: 241
    10-26-2016, 09:09 AM Go to last post
  26. Which forecast method for a time series like this one?

    Hi everyone, I do have a time series composed by 45 monthly observations and I am trying to figure out which kind of forecasting method is best...

    Started by Mark_‎, 10-11-2016 11:05 AM
    • Replies: 8
    • Views: 410
    10-25-2016, 03:32 PM Go to last post
  27. Relative Weights Analysis | Any good step-by-step guides out there?

    I am trying to conduct relative weights analysis on employee engagement data to prioritize where our org focuses its efforts. I'm running SPSS...

    Started by statsean‎, 10-25-2016 03:03 PM
    relative weights analysis
    • Replies: 0
    • Views: 206
    10-25-2016, 03:03 PM Go to last post
  28. Adding a control increases the impact of focal predictor -- sign of what?

    Hello dear forum members! I have recently been working on a mediation analysis, in which inclusion of an additional variable (say, C1) implies...

    Started by kiton‎, 10-24-2016 11:48 PM
    • Replies: 3
    • Views: 356
    10-25-2016, 11:17 AM Go to last post
  29. How to use Akaike's Information Criterion (AIC) for manual model reduction?

    Hi all, I wondered if anybody can explain to me how I can use the AIC for manual reduction of my GLM. I calculate a GLM with the following...

    Started by Fred.‎, 10-24-2016 07:52 AM
    • Replies: 1
    • Views: 363
    10-24-2016, 11:58 PM Go to last post
  30. Cross-sectional dependence, heteroskedasticity and serial correlation

    *** solved

    Started by Wooly‎, 10-24-2016 03:51 PM
    cross-sectional, econometrics
    • Replies: 0
    • Views: 271
    10-24-2016, 03:51 PM Go to last post
  31. Basic Estimation; Should I use future data?

    Hi everyone, I'm new on the forum but had a question to ask that's related to the work I currently do. I'm wondering if we should include...

    Started by Edorian‎, 10-04-2016 07:54 PM
    • Replies: 4
    • Views: 563
    10-23-2016, 11:24 PM Go to last post
  32. Comparison of one outcome to all the other outcomes

    Here is some data to play with set.seed(1e4) color = factor(c(rep("blue",20), rep("red",20), rep("yellow",150)),...

    Started by Remi‎, 10-23-2016 07:58 PM
    categorical vairable, hypothesis testing, logistic regression, mcmcglmm
    • Replies: 0
    • Views: 193
    10-23-2016, 07:58 PM Go to last post
  33. What p value to use for purposeful selection of variables for multivariate

    To do purposeful selection of variables for multivariate, can I use a p value of 0.15 cut off to select those significant variables from univariate ...

    Started by jm_manipadam‎, 10-23-2016 01:27 PM
    • Replies: 1
    • Views: 289
    10-23-2016, 02:28 PM Go to last post
  34. Is univariate analysis a must before binary logistic regression

    Could I enter all my independent variables directly for a binary logistic regression OR is it necessary that I should run a one way anova for...

    Started by jm_manipadam‎, 10-21-2016 08:19 PM
    • Replies: 8
    • Views: 368
    10-22-2016, 10:27 AM Go to last post
  35. How to handle non normally distributed residuals

    Currently we are working with a GEE model, at this point we are having doubts about our residuals which are not normally distributed. Log...

    Started by Cintia‎, 10-21-2016 10:58 AM
    • Replies: 0
    • Views: 210
    10-21-2016, 10:58 AM Go to last post
  36. Post Help with regression and related nominal values

    Hey all. I'd like some input on a regression analysis. I have data that measures the reactions of individuals to a number of objects and to a number...

    Started by infiniteline‎, 10-15-2016 01:35 PM
    multivariate, nominal variable, regression analysis
    • Replies: 5
    • Views: 349
    10-20-2016, 11:25 AM Go to last post
  37. GLM on non-linear/curvilinear data

    Dear all! I’m sure somebody of you will help me with my non-linear data-problem. I measured a fitness correlate of an animal (response variable)...

    Started by Fred.‎, 09-30-2016 09:54 AM
    anova
    • Replies: 6
    • Views: 523
    10-19-2016, 08:54 AM Go to last post
  38. Defining relation of a fold over design

    Dear All, I am reading the book DC Montgomery on my own. The book says that the defining relation for a foldover design will have L + U - 1 words...

    Started by ashimkapoor‎, 10-18-2016 02:50 PM
    doe
    • Replies: 0
    • Views: 194
    10-18-2016, 02:50 PM Go to last post
  39. Heteroscedastcty with large number of cases

    I ignore here that I have populations commonly :p I have heard that heteroscedastcity is not an issue when you have large sample sizes (I have ten...

    Started by noetsi‎, 10-14-2016 11:45 AM
    • Replies: 10
    • Views: 457
    10-17-2016, 02:21 PM Go to last post
  40. Multiple Regression study

    delete this

    Started by Giaco‎, 10-17-2016 03:52 AM
    • Replies: 0
    • Views: 237
    10-17-2016, 03:52 AM Go to last post
  41. Multicollinearity problem in binary logistic regression

    I'd like to ask for some help with a binary logistic regression. In SPSS I am trying to build a binary logistic regression with 4 independent...

    Started by kranas‎, 10-15-2016 06:20 AM
    logistic regression, multicollinearity
    • Replies: 2
    • Views: 300
    10-16-2016, 02:52 AM Go to last post
  42. Please Help Weird Question

    I have a very weird question which I guess is not replicated hopefully I can get an answer. when using the multiple regression analysis in excel via...

    Started by naderkamal188‎, 10-15-2016 07:35 PM
    • Replies: 1
    • Views: 249
    10-15-2016, 10:42 PM Go to last post
  43. Type 1 error in regression with entire populations

    I have read that you are not supposed to keep choosing different levels of the categorical variable to be the reference level, because this can cause...

    Started by noetsi‎, 10-13-2016 12:55 PM
    • Replies: 14
    • Views: 496
    10-15-2016, 11:50 AM Go to last post
  44. Many predictors relative to cases, want to identify interesting ones

    I've been helping a colleague with his research project. He is looking at the trustworthiness of profile texts. He is analyzing text entries using...

    Started by Junes‎, 10-13-2016 07:49 PM
    exploratory, lasso, linear regression, predictors, stepwise regression
    • Replies: 2
    • Views: 263
    10-14-2016, 03:31 PM Go to last post
  45. Interaction Terms in Linear regression

    In R I used the linear regression call for three variables: y, x, and c Y and X are numeric where C is a dichotomous {0,1}. X and C are the...

    Started by Z-Statistic‎, 10-12-2016 06:49 PM
    • Replies: 1
    • Views: 228
    10-12-2016, 09:48 PM Go to last post
  46. Linear Regression coeffiecients used in Exponential Regression

    I have a decay curve (y) with values 1, 0.75,0.64,0.54,0.46. The x values are 1,2,3,4,5. First a simple linear regression was performed (y =mx + b)....

    Started by Haripi314‎, 10-12-2016 12:36 PM
    exponential regression, linear regression
    • Replies: 0
    • Views: 195
    10-12-2016, 12:36 PM Go to last post
  47. 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 04:56 AM
    • Replies: 1
    • Views: 218
    10-12-2016, 09:12 AM Go to last post
  48. Static & Dynamic variables in one model

    Hello! My name is Valentina and I am a Master student, currently working on my MSc thesis. I am examining the effect of Politicians on the board...

    Started by monicanic‎, 10-12-2016 04:03 AM
    • Replies: 0
    • Views: 185
    10-12-2016, 04:03 AM Go to last post
  49. Multivariate ''binary'' logistic regression...???

    Hello all, My name is Nick. I am a doctor and i would appreciate any of your help in the above problem. Recently, on purpose to delineate/propose a...

    Started by nok‎, 10-11-2016 01:33 PM
    • Replies: 3
    • Views: 238
    10-11-2016, 02:55 PM Go to last post
  50. Regression Lines

    Can someone please explain this to me In a random sample of 40 students, the mean number of hours spent studying is 7.5 with a standard deviation...

    Started by Ahmed.abdullah‎, 10-11-2016 12:36 PM
    • Replies: 1
    • Views: 213
    10-11-2016, 12:48 PM Go to last post
  51. Country Variable

    Hi Stata Experts, I have a question concerning an idea for my thesis. I have firm-specific data (assets, sales, income etc.) for different firms...

    Started by corazon92‎, 10-11-2016 09:27 AM
    • Replies: 0
    • Views: 173
    10-11-2016, 09:27 AM Go to last post
  52. Regression after multiple imputation

    Hello every one. I want to perform simple binary logistic regression after multiple imputation but I constantly get this message and the execution of...

    Started by johnstatistic‎, 10-05-2016 10:32 PM
    multiple imputations, regression analysis
    • Replies: 5
    • Views: 420
    10-10-2016, 08:45 PM Go to last post
  53. Cool Approximating the probability of an event occuring from the output of a Poisson GLM

    Hi all, I have some data that includes the output of a Poisson Log Link model, that aims to predict how many times an event will occur over the...

    Started by skinicod‎, 10-08-2016 10:47 AM
    glm, log link, poisson
    • Replies: 2
    • Views: 332
    10-10-2016, 12:15 PM Go to last post
  54. Spearman's Correlation and Wilcoxon Signed Rank Test

    Hey guys! I have an urgent question for my master thesis. In my thesis, I'm comparing 4 performance metrics. My data consists of 100 funds and...

    Started by leomessi178‎, 10-10-2016 12:13 PM
    • Replies: 0
    • Views: 183
    10-10-2016, 12:13 PM Go to last post
  55. Regression with additive and multiplicative predictors

    Hi, we are analyzing pollutants in mussels with regression models. Let's say we have only the two predictors (1) "year" and (2) "month". However,...

    Started by mmercker‎, 10-08-2016 01:44 PM
    additivem, regression
    • Replies: 8
    • Views: 416
    10-10-2016, 08:50 AM Go to last post
  56. OLS Regression w/ longitudinal data

    I have a longitudinal data set with two waves. Several variables exist in both waves. I want to examine the following question with and OLS...

    Started by ReneRopac‎, 10-07-2016 04:33 PM
    • Replies: 0
    • Views: 192
    10-07-2016, 04:33 PM Go to last post
  57. Postive correlation but negative coefficient in regression??

    Im a little confused by some results I have..... I have two predictor variables and an outcome variable. The first predictor is positively...

    Started by statto‎, 08-20-2011 10:39 AM
    2 Pages
    1 2
    rho/beta conflict, suppression
    • Replies: 23
    • Views: 39,529
    10-07-2016, 05:31 AM Go to last post
  58. Exclamation Stationary data first after the 2-order/3-order difference on LN(variable)

    I want to make an Linear Regression. Dependent variable: GDP Independent variables: Net exports and Debt and some control variables All variables...

    Started by APA‎, 10-06-2016 09:33 AM
    differencing, linear regression, non-stationarity, ols, stationarity
    • Replies: 0
    • Views: 261
    10-06-2016, 09:33 AM Go to last post
  59. What information can we get from the table of deviance residual (regression)?

    Hello, I was wondering what's the importance and substantive interpretation of the table of deviance residual in the context of (logistic)...

    Started by gianmarco‎, 10-05-2016 10:01 AM
    • Replies: 0
    • Views: 203
    10-05-2016, 10:01 AM Go to last post
  60. help me wid this question

    hi everyone i want the solution of this question before sunday i will post the regression table here just help me in answering the questions

    Started by softy‎, 10-01-2016 01:31 AM
    • Replies: 3
    • Views: 524
    10-05-2016, 12:29 AM Go to last post

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