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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Comparing Regression Slopes Across 3 Groups - SPSS

    I am running a simple regression with one dependent variable and one independent variable but splitting the results by group (3 groups). So, I am...

    Started by JerLon‎, 01-03-2014 06:56 PM
    • Replies: 4
    • Views: 3,032
    01-04-2014, 05:47 PM Go to last post
  2. Clusters in regression

    Hi, I'm using SAS for regression analysis. I have a series of observations of temperatures. I've two tempratures - one in country X and one in...

    Started by ofir‎, 09-07-2013 08:32 AM
    • Replies: 4
    • Views: 2,759
    09-08-2013, 11:23 AM Go to last post
  3. How to use LASSO with common shocks

    I am trying to use LASSO for variable selection, on a balanced panel. I have a total of 14 predictors, and would like to reduce this variable space....

    Started by mariamb‎, 08-27-2013 09:56 AM
    econometrics, lasso, predictive model, regression
    • Replies: 4
    • Views: 1,561
    08-27-2013, 10:50 AM Go to last post
  4. Need help with regression analysis

    Hi everyone, I am kinda confused with regression analysis. My research is to investigate the degree and trend women in the construction industry...

    Started by tayvuihan‎, 09-06-2013 07:01 AM
    advise, analyse, problem, regression, statistic
    • Replies: 4
    • Views: 1,714
    09-06-2013, 10:13 AM Go to last post
  5. Large part of population sampled with logistic regression

    Hi all, Back from a hiatus with a question. I'm doing an analysis on survey data on commuting to work. We're interested in the factors that...

    Started by Junes‎, 10-16-2013 07:41 PM
    • Replies: 4
    • Views: 1,419
    10-16-2013, 09:20 PM Go to last post
  6. Reading Binary Logistic Regression results

    Hi! Need some help on Binary Logistic Regression results interpretation. 1) On Block 0: Begining Block i have overall percentage of 76%, but...

    Started by MarisaFernandes‎, 09-12-2013 06:43 PM
    logistic regression, results
    • Replies: 4
    • Views: 3,393
    09-13-2013, 08:10 PM Go to last post
  7. unstandardised coeffcients value over 1.0?

    Hello all First post from somebody who uses stats for work but not a statistician Dumb question perhaps, but if my multiple regression...

    Started by NT5224‎, 10-07-2013 01:44 AM
    • Replies: 4
    • Views: 1,488
    10-07-2013, 10:55 AM Go to last post
  8. Can logistic regression give opposite results than univariate analyses?

    Dear anyone I am studying the risk for taking drug X. My study population includes >500 people. I have a list of variables (gender, age…)...

    Started by loedrup.ab‎, 10-09-2013 08:56 AM
    • Replies: 4
    • Views: 2,751
    10-11-2013, 03:25 AM Go to last post
  9. Stationarity in regression

    This is much a time series question as a regression one, but I work a lot with regression using time series data these days. I am running regression...

    Started by noetsi‎, 10-10-2013 09:59 AM
    • Replies: 4
    • Views: 3,815
    10-10-2013, 12:09 PM Go to last post
  10. Adjust for which confounders

    Hello! I have done a logistic regression to compare pregnancy rates amongst various ordinal categories of a specific blood hormone measurement....

    Started by t3nnam‎, 10-23-2013 04:22 AM
    confounding
    • Replies: 4
    • Views: 2,602
    10-23-2013, 10:58 AM Go to last post
  11. Logistic regression probabilities

    Hi I have built a logistic regression model that predicts the response probability from a marketing campaign. The model ranks correctly (i.e. the...

    Started by JMvS‎, 10-22-2013 05:36 AM
    link function, logistic regression, logit
    • Replies: 4
    • Views: 1,595
    10-23-2013, 07:57 AM Go to last post
  12. Interpretaing the coefficients of polynomial regression and multiple regression.

    How do i interpret the coefficients of the 2nd degree polynomial regression model: (crop yield)=1.22+2.1(Nitrogen doses)+3.1(Nitrogen doses)^2 ...

    Started by akash_ansari‎, 10-10-2013 08:10 PM
    multiple regression, polynomial regression
    • Replies: 4
    • Views: 1,421
    10-12-2013, 08:00 AM Go to last post
  13. Multiple Regression Equation Analysis for Percentage?

    Hi, I am hoping someone can help me understand something. I have the following multiple regression equation (note thse numbers are just an example...

    Started by abe333200‎, 11-02-2013 02:02 PM
    • Replies: 4
    • Views: 2,818
    11-02-2013, 02:36 PM Go to last post
  14. Multiple Linear Regression and likelihood Ratio Test

    Hi All, I have completed multiple regressions with one model including an interaction term, and the other not including the interaction term. ...

    Started by chiccaboom‎, 11-05-2013 09:44 PM
    • Replies: 4
    • Views: 5,681
    11-06-2013, 09:22 PM Go to last post
  15. Goodness of fit for Mixed effects Logistic Regression

    Dear all, I am trying to assess the goodness of fit of random effects Logistic regression. a) I would have used a Hosmer-Lemeshow test, but how...

    Started by ledzep‎, 12-02-2013 06:15 PM
    • Replies: 4
    • Views: 6,018
    12-02-2013, 09:52 PM Go to last post
  16. Newbie question about direction of bias

    Lets say you have a regression With only one regressor, subjected to omitted variable bias. Will the direction of bias only depend on the direction...

    Started by unlucky__ip‎, 12-02-2013 11:27 AM
    • Replies: 4
    • Views: 2,772
    12-04-2013, 06:48 PM Go to last post
  17. Regression Equation Porblem

    My regression equation doesn't seem to be matching up with my model/data. My equation is y= -11.844+0.559(x). I ran this regression in excel...

    Started by chocpretz‎, 12-03-2013 01:16 AM
    • Replies: 4
    • Views: 1,885
    12-03-2013, 02:26 PM Go to last post
  18. what t value is usually the threshold for significance?

    i have an exercise asking me to estimate the t values of the coefficients of my regression and then state if they significant or not. but he does not...

    Started by eac13‎, 01-04-2014 07:32 PM
    • Replies: 4
    • Views: 5,080
    01-05-2014, 12:36 AM Go to last post
  19. interpreting result of a linear regression

    Sir/Ma'am, I would like to seek your help on interpreting the results i made on the attached file. This was made using data analysis on excel...

    Started by reindrew‎, 01-15-2014 10:29 AM
    • Replies: 4
    • Views: 1,273
    01-21-2014, 06:11 AM Go to last post
  20. can you help me interpret this?

    Vitamin D varies with season, below is a method of de-seasonalising vit D from literature. I'm not too sure what they've done after regressing the...

    Started by bobmcpop‎, 12-30-2013 06:50 AM
    • Replies: 4
    • Views: 1,707
    01-04-2014, 10:50 AM Go to last post
  21. regression transformation problems

    I am currently writing a dissertation on the causes of regional unemployment. My dependent variable is unemployment rate (%). I plan to carry out...

    Started by kaype‎, 01-11-2014 07:11 PM
    • Replies: 4
    • Views: 1,213
    01-12-2014, 10:54 AM Go to last post
  22. Math interpretation of linear regression through the origin and related estimates

    Hello all, while group-doing some basic linear regression I've stumbled upon a puzzling matter. Given a set of points in the form (x_i, y_i), I...

    Started by ocirne94‎, 12-19-2013 04:44 PM
    angular coefficient, arithmetic mean, chi-square, linear regression
    • Replies: 4
    • Views: 1,933
    12-20-2013, 09:08 AM Go to last post
  23. Derivation of t-test for regression coefficient

    Hello, at the moment I am researching, if the t-statistic is appropriate for a significance test of the regression coefficient on a dummy...

    Started by consuli1‎, 12-26-2013 06:33 PM
    • Replies: 4
    • Views: 2,306
    12-28-2013, 12:36 PM Go to last post
  24. What Regression Analysis Should I Employ

    Hi, I would really appreciate some help with this. I am looking to see if employees' organisational history (such as voluntary/involuntary turnover)...

    Started by CA92‎, 01-24-2014 10:48 AM
    anova, regression, regression analysis
    • Replies: 4
    • Views: 1,397
    01-25-2014, 05:17 AM Go to last post
  25. Addressing unequal error variance

    AKA heteroskedacity Other than logging (when that works) and WLS, which I commonly lack the information or intelligence to use, what is the...

    Started by noetsi‎, 02-04-2014 12:10 PM
    • Replies: 4
    • Views: 1,157
    02-04-2014, 01:36 PM Go to last post
  26. How to derive the r squared of an interaction term within a model

    Hi there, I am using Hayes' (2013) PROCESS macro to run a simple moderation, and I have the R-sq for the entire model. (M moderates the...

    Started by life-long learner‎, 02-28-2014 07:35 PM
    • Replies: 4
    • Views: 3,412
    03-03-2014, 03:18 PM Go to last post
  27. Predicted probabilities from logistic regression

    Hi, I have carried out logistic regression in STATA to adjust for several patient characteristic variables that are thought to affect my outcome....

    Started by j00sel00se‎, 03-14-2014 08:20 AM
    logistic regression, predictions
    • Replies: 4
    • Views: 2,544
    03-17-2014, 04:51 AM Go to last post
  28. Regression Tree Help Using Rattle portion of R

    Hi all, I was wondering if someone could help me with an explanation of a Regression Tree I have created using the Rattle portion of R. I have...

    Started by glorifiedfisherman‎, 03-18-2014 08:59 PM
    • Replies: 4
    • Views: 3,393
    03-20-2014, 12:19 PM Go to last post
  29. [SOLVED] model coefficients

    I need a little help with the output of this model. Below is the output of a linear model of log river flow over time: ...

    Started by bugman‎, 04-03-2014 01:00 AM
    • Replies: 4
    • Views: 1,520
    04-03-2014, 10:27 PM Go to last post
  30. Problems with time series model

    Hello. I want to run a pretty simple ADL model, and I have a couple of problems: My model: - Consumption (Ct) as the dependent variable -...

    Started by TCAC‎, 04-08-2014 10:40 AM
    • Replies: 4
    • Views: 1,658
    04-14-2014, 12:01 PM Go to last post
  31. Getting values larger than 1 for a logit test?

    I have run a logit test on a binary dependent variable "gambled?" against "Age" in STATA. I have the dependent variable coded as 0 for no and 1 for...

    Started by AliT128‎, 04-08-2014 12:20 PM
    binary, interpret, logit, stata, variable
    • Replies: 4
    • Views: 1,367
    04-08-2014, 02:02 PM Go to last post
  32. Estimate the coefficients of an equation system - can I use OLS?

    Hi! I have not worked so much with this type of regressions and have tried to find the answer in my econometric books and on internet, but have...

    Started by Coffeedrinker‎, 04-22-2014 06:05 PM
    econometrics, equation, ols, regression, time series
    • Replies: 4
    • Views: 1,680
    04-24-2014, 04:18 PM Go to last post
  33. [age] discrete variable or continuous variable in linear regression?

    Hi i need some help. I hope you can guide me. I have a survey and i need to predict the variable e18. The issue is i'm not sure how to treat the...

    Started by jfca283‎, 04-24-2014 11:23 AM
    • Replies: 4
    • Views: 3,168
    04-24-2014, 12:51 PM Go to last post
  34. Characteristics that define simple linear regression?

    Can someone please tell me which three characteristics define simple linear regression? Thank you in advance.

    Started by cfvera‎, 05-01-2014 05:39 PM
    • Replies: 4
    • Views: 2,305
    05-05-2014, 10:44 AM Go to last post
  35. Categorical data tested for several factors: which test should I use?

    Hi guys, I'm currently doing a research project as part of my internship on mangrove damage along a river as a consequence of a major flood...

    Started by Robert1707‎, 05-11-2014 06:23 PM
    categorical data, dependent variables, factors, independent variable, test
    • Replies: 4
    • Views: 1,407
    05-14-2014, 11:53 AM Go to last post
  36. compare regression effects nested models

    Dear forum, The following problem is puzzling me for a while. Suppose I have two nested models, where y is the same dependent variable and x1 is...

    Started by benp‎, 05-27-2014 05:13 AM
    effect change controlling
    • Replies: 4
    • Views: 1,860
    05-29-2014, 12:50 PM Go to last post
  37. How to interpret control variabele in logistic regression with interactions

    Hi guys, Im doing this in binary logistic regression using SPSS. So I have some main effects in a first block: the independent variabeles :...

    Started by Annvdb‎, 05-22-2014 09:09 AM
    • Replies: 4
    • Views: 1,761
    05-23-2014, 12:01 AM Go to last post
  38. Mixing lasso with OLS

    Hi, I am looking at a data set of 45 continuous IV and 1 DV, trying to find an acceptable regression model. I tried the lasso with cross-validation...

    Started by rogojel‎, 06-02-2014 01:28 PM
    lasso, model building, ols regression, p-value
    • Replies: 4
    • Views: 3,251
    06-06-2014, 02:50 PM Go to last post
  39. Mediation in a Piecemeal Growth Curve Model

    tl;dr version: In a piecemeal growth curve model test of mediation in a RCT can I calculate the indirect effect via (a: piecemeal:treatment -->...

    Started by Lazar‎, 06-02-2014 12:01 AM
    • Replies: 4
    • Views: 1,518
    06-04-2014, 04:56 PM Go to last post
  40. Multiple Linear Regression

    I was given an assignment to fill in the blanks (shown as ?s here) for a multiple linear regression problem. I can get MS error and SS error easily....

    Started by Magyar‎, 06-21-2014 05:56 PM
    • Replies: 4
    • Views: 1,369
    06-22-2014, 03:04 PM Go to last post
  41. Reverted coefficient

    Dear all, I really hope somebody can help me out here. I have a problem concerning the outcome of my hierarchical multiple regression model. I...

    Started by MaxStat‎, 07-15-2014 07:49 AM
    • Replies: 4
    • Views: 1,310
    07-15-2014, 01:39 PM Go to last post
  42. Logistic regression significant test

    Dear all, I have done logistic regression for 20 independent variables for which all of them are categorical (0 and 1) also 1 binomial response...

    Started by smurts‎, 07-16-2014 09:06 AM
    • Replies: 4
    • Views: 1,291
    07-16-2014, 04:50 PM Go to last post
  43. what is a midpoint?

    Hello, I am learning logistic regression using the book Applied logistic regression by Hosmer and Lemeshow (2000). On page 107, there is a table...

    Started by t.wang21@yahoo.com.au‎, 07-02-2014 08:35 PM
    • Replies: 4
    • Views: 1,321
    07-02-2014, 09:25 PM Go to last post
  44. Help a newbie with multiple statistical regression.

    I want to run a multiple stastical regression in SPSS, trying to correlate different biomarkers with a brain region (hippocampus), at the same...

    Started by trexter‎, 07-08-2014 11:16 AM
    • Replies: 4
    • Views: 1,725
    07-10-2014, 07:28 AM Go to last post
  45. What I can conclude if the CI of different regression models are not overlapping?

    I asked to build a graph of the means and confidence intervals of β1 values from 4 regression models and conclude about their statistical...

    Started by Scrooge‎, 07-11-2014 02:51 PM
    • Replies: 4
    • Views: 1,431
    07-12-2014, 11:33 AM Go to last post
  46. cox regression

    I am new to this method, so I started this thread for questions on it. :p Some discussions of Cox treat it as a counting process and others do...

    Started by noetsi‎, 09-08-2014 08:35 AM
    • Replies: 4
    • Views: 2,187
    09-08-2014, 02:16 PM Go to last post
  47. Question Coefficient of determination interpretation

    Hey guys, this my first post in here so hello everyone:) I have a question regarding the coefficient of determination. Wikipedia says: An...

    Started by bgst‎, 09-09-2014 07:51 AM
    • Replies: 4
    • Views: 2,085
    09-17-2014, 04:58 PM Go to last post
  48. what is correlation???!!!!

    what is the meaning of correlation??????????

    Started by haraharae‎, 09-12-2014 12:45 PM
    • Replies: 4
    • Views: 1,787
    12-14-2014, 11:56 AM Go to last post
  49. Binary IV and ordinal DV, suggestions for a model?

    Hi guys! Just started at a new company having graduated this year, theyve got me analysing data and producing some key driver analytics. Thing is,...

    Started by Bfernandez‎, 09-19-2014 11:20 AM
    • Replies: 4
    • Views: 2,791
    10-01-2014, 03:57 AM Go to last post
  50. Linear Regression

    Please see this link: http://www.statisticsforum.com/showthread.php?p=4240#post4240

    Started by DDD‎, 09-25-2014 01:56 PM
    • Replies: 4
    • Views: 1,863
    09-25-2014, 04:28 PM Go to last post
  51. Calculating AUC for just one binary variable legitimate?

    Dear members of talkstats, I am a junior Radiology resident in France and I have an urgent question about my study. I am checking the capability...

    Started by MeganFrance‎, 10-13-2014 03:19 PM
    • Replies: 4
    • Views: 1,392
    11-08-2014, 08:06 AM Go to last post
  52. Question Forecasting with fewer data points

    Hi, Can someone provide more insights on how we can achieve forecasting with fewer data points and come up with more accurate models. I have...

    Started by sihasan‎, 10-23-2014 07:53 AM
    forecasting
    • Replies: 4
    • Views: 2,432
    10-29-2014, 08:46 AM Go to last post
  53. Interaction/Moderation Question

    So I know that the terms interaction and moderation are used pretty much interchangeably. However, is it possible for variables to interact without...

    Started by RER31‎, 11-14-2014 09:36 PM
    • Replies: 4
    • Views: 1,973
    11-16-2014, 08:42 AM Go to last post
  54. Question Generate model from known independent & dependent variables. Does this make sense?

    I am on a new job as a statistician, after studying stats some years ago. So please bear with me as I seek a solution to my problem. I'm trying...

    Started by bnew‎, 12-10-2014 04:52 PM
    known variables
    • Replies: 4
    • Views: 2,425
    12-15-2014, 05:56 PM Go to last post
  55. Measurement error

    An econometrician I am reading notes that if the IV are measured with error the least square estimators are biased towards zero. I assume, I doubt...

    Started by noetsi‎, 12-30-2014 09:40 AM
    • Replies: 4
    • Views: 954
    12-30-2014, 02:34 PM Go to last post
  56. Appropriate Regression Method?

    Hi guys, I'm relatively new to statistics, and I'm searching for an answer as to which regression method would be most appropriate for the problem...

    Started by MMack‎, 01-05-2015 11:22 PM
    • Replies: 4
    • Views: 2,006
    01-07-2015, 06:39 PM Go to last post
  57. Binary Logistic Regression and Generalised Linear Model

    I have basic understanding of statistics and am trying to interpret the output of a generalised linear model. The data used in my analyses...

    Started by jle‎, 01-21-2015 11:54 PM
    • Replies: 4
    • Views: 1,586
    01-22-2015, 09:43 PM Go to last post
  58. Transforming skewed data without decreasing kurtosis

    Have a data set with negative kurtosis and skewness values. Have tried numerous transformations but cannot find a solution that generates acceptable...

    Started by DrJames‎, 02-06-2015 03:09 PM
    • Replies: 4
    • Views: 2,413
    02-07-2015, 12:52 PM Go to last post
  59. 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: 2,189
    04-09-2015, 08:10 PM Go to last post
  60. 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: 1,304
    04-25-2015, 09:57 AM Go to last post

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