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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Question on interpreting test statistics/regression coefficients

    When I run a regression of: logwage = height + dummy variables for each different occupation The coefficients on the dummy variables are all...

    Started by dataset‎, 02-23-2014 04:34 PM
    • Replies: 3
    • Views: 1,528
    03-01-2014, 05:18 PM Go to last post
  2. Mincer equation - problems with multicollinearity

    I'm trying to construct a Mincer equation for earnings, however when I run the regression, there is a problem of multicollinearity between experience...

    Started by dataset‎, 03-02-2014 03:09 PM
    • Replies: 1
    • Views: 1,686
    03-02-2014, 09:38 PM Go to last post
  3. Can someone help me interpret this data?

    I'm performing multiple regression for an international relations thesis regarding various predictor variables and the outcome of intervention in...

    Started by datorres85‎, 06-18-2016 09:01 PM
    • Replies: 5
    • Views: 1,140
    06-19-2016, 06:58 PM Go to last post
  4. Least Squares

    Delete. Unhelpful responses.

    Started by Dave Brunner‎, 09-08-2015 08:20 PM
    • Replies: 8
    • Views: 3,292
    09-09-2015, 06:21 PM Go to last post
  5. R2 significance for smooth data

    I think this is a simple question but I've been unable to find an answer in textbooks, by searching this forum or on-line. How do I determine if an...

    Started by Dave W‎, 01-16-2013 11:23 AM
    • Replies: 0
    • Views: 1,090
    01-16-2013, 11:23 AM Go to last post
  6. Looking for mult. linear regression equations

    Hi - I'm having trouble finding the equations for the coefficients for a multiple linear regression with two independent variables (a=, b1=, b2=). ...

    Started by dave25‎, 11-26-2008 07:28 PM
    • Replies: 1
    • Views: 3,070
    11-26-2008, 08:13 PM Go to last post
  7. 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: 1,227
    04-06-2016, 04:44 AM Go to last post
  8. 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: 5,643
    09-18-2013, 09:14 AM Go to last post
  9. is there a non parametric alternative to multiple linear regression?

    Hi all, I would like to know is there a non parametric alternative to multiple linear regression? when I google the quesion I get a lot of info...

    Started by David Williams‎, 09-21-2010 11:25 AM
    • Replies: 7
    • Views: 27,985
    10-07-2010, 03:37 PM Go to last post
  10. Data set simulation

    Answered on other threads, sorry for posting

    Started by David2‎, 07-07-2016 12:07 PM
    correlation, regression, simulation
    • Replies: 1
    • Views: 2,168
    07-07-2016, 01:12 PM Go to last post
  11. Error term in log-level models?

    I am running a decomposition of log wages for two time periods and want to explain the variance of the error term. My question is: If there is a...

    Started by David@talkstats‎, 06-26-2015 11:18 AM
    anova, heteroskedasticity, log transformation, regression
    • Replies: 0
    • Views: 877
    06-26-2015, 11:18 AM Go to last post
  12. [Probit] Can I be confident in my results even with a poor Goodness-of-Fit test?

    I am running a probit analysis on a data set with about 1000 cases, predicting probability of college graduation by a set of college institutional...

    Started by DavidBill‎, 02-18-2011 01:08 PM
    • Replies: 3
    • Views: 4,319
    02-18-2011, 03:27 PM Go to last post
  13. Probit Model: Liklihood Ratio Significant, Very Low Pseudo R-Square

    I'm running a probit model in Stata, and I'm a bit confused by the results. The LR test is highly significant, .0000, but the Pseudo R-Square is very...

    Started by DavidBill‎, 02-25-2011 02:34 AM
    • Replies: 0
    • Views: 5,045
    02-25-2011, 02:34 AM Go to last post
  14. Addendum: Probit Model, Liklihood Ratio Significant, Very Low Pseudo R-Square

    Multicollinearity does not appear to be a problem. None of the predictor variables has a VIF over 1.5.

    Started by DavidBill‎, 02-25-2011 08:47 AM
    • Replies: 2
    • Views: 3,839
    02-25-2011, 11:23 AM Go to last post
  15. Regression Assumptions for Binary Dependent Variable Models?

    I was wondering if anyone could direct me to a good source on this, or just answer my question directly. What are the assumptions made for a...

    Started by DavidBill‎, 03-04-2011 12:00 AM
    • Replies: 3
    • Views: 19,002
    03-04-2011, 12:20 PM Go to last post
  16. Standard error of multiple regression coefficients

    I was revising my undergraduate courses of Statistics which I took before 20 years. I was exercising how to construct ANOVA table for a regression...

    Started by davidbinyam‎, 05-29-2008 11:13 AM
    • Replies: 14
    • Views: 34,416
    12-11-2009, 07:49 PM Go to last post
  17. marginal effect with wald test

    Hi there, In an econometrics assignment we have to check what variable has the largest and smallest marginal effect on our dependent variable wage....

    Started by davidmax1990‎, 02-14-2012 12:29 PM
    • Replies: 0
    • Views: 1,788
    02-14-2012, 12:29 PM Go to last post
  18. Insignificant marginal effects of a significant interaction term?

    Is it possible that a highly significant interaction term, does not have significant marginal effects at various levels of the primary explanatory...

    Started by davidveriksen‎, 02-10-2014 07:07 AM
    interaction, marginal effects, significance
    • Replies: 0
    • Views: 962
    02-10-2014, 07:07 AM Go to last post
  19. how to explian the insig. main effect without sig. coefficient of interaction?

    I am doing the research using the panel data. My confusions follow. Y=x1+x2: X1 sig, but X2 insig. however, when interaction is put into the model...

    Started by davidxu‎, 07-28-2016 01:40 AM
    • Replies: 3
    • Views: 1,720
    08-08-2016, 10:49 PM Go to last post
  20. Preliminary Analysis in MultiLevel Analysis

    Hallo there, my name is David. I am currently trying to do a multi level analysis. I am attempting a simple multilevel analysis. One of my...

    Started by David_D‎, 09-13-2014 03:33 AM
    • Replies: 0
    • Views: 1,124
    09-13-2014, 03:33 AM Go to last post
  21. Multilevel: Include only two dummies of a 7-1 dummy set into random slope?

    I am calculating a two-level linear multilevel analysis. A look at the random intercept random slope model showed me a significant decrease in my...

    Started by David_D‎, 10-15-2014 11:44 AM
    • Replies: 5
    • Views: 2,509
    10-16-2014, 01:50 PM Go to last post
  22. Slope over time

    Hello, I wanting to compare customer counts by different stores and thought that slope would be the best way to do this. So, I used linear...

    Started by Dbero‎, 07-13-2013 01:38 PM
    • Replies: 0
    • Views: 1,083
    07-13-2013, 01:38 PM Go to last post
  23. Comparing effect sizes of two longitudinal linear relationships

    Is there a way to determine if one longitudinal linear relationship is significantly stronger than another? I was planning on using regression...

    Started by dbt_healthpsych‎, 06-08-2017 12:51 PM
    effect sizes, longitudinal data, moderated multiple regres
    • Replies: 2
    • Views: 384
    06-08-2017, 10:16 PM Go to last post
  24. crazy b and exp(b) in logistic

    Hi I'm running an interaction in logistic regression and when I do so my b and exp(b) for one of my main effect variables gets crazy. I know that...

    Started by dce219‎, 05-27-2011 11:40 AM
    • Replies: 4
    • Views: 2,728
    05-27-2011, 01:20 PM Go to last post
  25. coefficient changes direction with interaction term entered

    Hi I'm running a logistic regression and my first model tests the direct effects of a variable (X) which is initially negative. In the second model...

    Started by dce219‎, 06-11-2011 10:05 AM
    • Replies: 2
    • Views: 7,299
    06-13-2011, 08:47 PM Go to last post
  26. Must categorical variables always be dummy coded in linear regression?

    My question is must we always dummy code categorical variables in linear regression. What if I wanted to understand the overall effect of a...

    Started by dce219‎, 02-05-2015 11:05 PM
    • Replies: 2
    • Views: 2,131
    02-06-2015, 04:43 AM Go to last post
  27. Classification with high positive predictive value

    I have a two-class classification problem. I would like to train a multivariate classifier with 100% positive predictive value. In other words, I...

    Started by dchalmer‎, 09-17-2013 09:52 AM
    classification, predictive model, predictive value
    • Replies: 3
    • Views: 1,941
    09-30-2013, 11:51 AM Go to last post
  28. Best Way to Format an Excel Data Sheet for export to R.

    Hi. I am conducting a multiple linear regression using Panel data for my finance honours research project. I have collected data for 100 stocks...

    Started by DCKALE002‎, 08-06-2015 08:10 AM
    • Replies: 0
    • Views: 1,070
    08-06-2015, 08:10 AM Go to last post
  29. Damage Assessment

    I apologize for this question being exceedingly vague, but I'm not sure of the correct terminology. After running a regression analysis, I have...

    Started by DCohen‎, 05-23-2008 03:17 PM
    • Replies: 4
    • Views: 3,063
    05-25-2008, 09:07 AM Go to last post
  30. Post Model to use, fractions as independent and dependent variables

    Hi, I have some background on doing regression analysis, however never on fractional variables. My question is related to model selection on...

    Started by ddali‎, 11-14-2015 10:13 AM
    fraction, regression analysis
    • Replies: 1
    • Views: 1,750
    11-14-2015, 04:36 PM Go to last post
  31. 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: 1,862
    09-25-2014, 04:28 PM Go to last post
  32. Logistic regression question

    Hi everyone, I have a question regarding an exercise on Gujarati's "Basic Econometrics" (exercise 15.2 p.625 4th edition). In this exercise we are...

    Started by ddrebelo‎, 03-25-2011 05:47 AM
    • Replies: 0
    • Views: 2,128
    03-25-2011, 05:47 AM Go to last post
  33. Weightings Problem

    I have been given an EXCEL model and my assigned task is (only) to fix it for problems that I might call "unintended consequences" of the underlying...

    Started by deanalt‎, 07-16-2007 09:32 PM
    • Replies: 4
    • Views: 2,966
    07-19-2007, 02:33 PM Go to last post
  34. Multiple regression analysis

    Hi I was wondering if anyone can help me regarding multiple regression analysis. I have used the Stats program Minitab to analyse a large amount of...

    Started by Deanne‎, 02-03-2008 12:13 AM
    • Replies: 1
    • Views: 2,795
    02-04-2008, 03:26 PM Go to last post
  35. Regression verses ANOVA models

    Suppose you run both an ANOVA and a linear regression model on the same data using the same dependent variable and set of independent variables. The...

    Started by DeAnne Hunt‎, 11-07-2011 07:34 PM
    • Replies: 1
    • Views: 2,571
    11-07-2011, 08:03 PM Go to last post
  36. Multinomial logistic regression - testing assumptions

    Hello everyone, I'm trying to perform an MLR with 4 continuous predictors for one ordinal dependent. I've tested my assumptions for the MLR except...

    Started by debadog‎, 06-24-2016 09:55 AM
    • Replies: 8
    • Views: 2,054
    07-07-2016, 09:02 AM Go to last post
  37. Hausman-McFadden Test (IIA)

    Hello, I need to carry out a Hausman-McFadden test before I run a multinomial logistic regression on my data. While I've successfully run an...

    Started by debadog‎, 07-07-2016 07:08 AM
    • Replies: 0
    • Views: 1,708
    07-07-2016, 07:08 AM Go to last post
  38. order determination sample size for autoregression

    Hi I am new to autoregression. I want to determine the order of an autoregression given a sample of size S1. I plan to use ordinary least...

    Started by debnathm‎, 04-13-2015 12:44 PM
    autoregressive, order determination, sample size
    • Replies: 0
    • Views: 1,655
    04-13-2015, 12:44 PM Go to last post
  39. Linear regression of complex survey data using proc surveyreg, normality??

    Hi, I'm trying to do a linear multivariate model of a continuous outcome (minutes per week of physical activity). The data I'm using was collected...

    Started by debosaldo‎, 02-05-2013 05:28 PM
    • Replies: 0
    • Views: 917
    02-05-2013, 05:28 PM Go to last post
  40. normality transformation and regression

    Hi, I have performed 1/sqrtY, and sqrtY transformations on different data sets to achieve normal distribution for simple linear regressions. So...

    Started by Deccantraps‎, 07-03-2014 03:52 AM
    normality transformation, regression
    • Replies: 6
    • Views: 1,544
    07-04-2014, 03:11 AM Go to last post
  41. cooks distance cutoff

    Hello, I urgently need to find out what is happening in regards to below: I am doing a huge number of simple linear regressions. For each...

    Started by Deccantraps‎, 08-07-2014 03:37 AM
    cooks distance, outlier detection
    • Replies: 9
    • Views: 10,466
    08-08-2014, 10:18 PM Go to last post
  42. Multiple Linear Regression Problem

    Hi, I want to do a multiple regression analysis. I have one Y which are numeric values (sample number = 85) and the following Xs. Sr...

    Started by Deccantraps‎, 08-17-2014 11:37 PM
    multiple regression, stepwise
    • Replies: 1
    • Views: 907
    08-18-2014, 01:13 AM Go to last post
  43. Can the PCA scores be used as variables in multiple linear regression

    Hello, I used PCA to reduce the dimensions of a data set of 10 variables into 2 principal components (describing 82% of variance in data set of 10...

    Started by Deccantraps‎, 08-27-2014 06:49 PM
    multiple regression, pca
    • Replies: 6
    • Views: 1,899
    08-31-2014, 04:04 AM Go to last post
  44. 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: 1,265
    08-30-2014, 04:53 AM Go to last post
  45. Question Comparing Multiple Regression across multiple groups

    I am looking at 4 different predictors of eating disorders in 4 different groups of participants (Caucasians, Af Americans, Lations, and Asian...

    Started by dee515‎, 03-12-2013 12:31 PM
    • Replies: 1
    • Views: 2,654
    03-12-2013, 02:58 PM Go to last post
  46. Multiple regression Analysis-How many regression analyses do I need to run?

    In the present study we examined whether religious affiliation, education level, and negative affect were uniquely associated with the core beliefs...

    Started by Dee6619‎, 11-28-2012 12:19 PM
    • Replies: 3
    • Views: 1,511
    11-28-2012, 04:07 PM Go to last post
  47. Dummy Coding of Variable and interpretation

    Discussion One of my IV in my regression analysis is religion 1=Catholic 2=Jewish 3=Protestant 4=muslim 5=other 6=none I recoded religion as...

    Started by Dee6619‎, 11-28-2012 04:18 PM
    • Replies: 8
    • Views: 2,771
    11-29-2012, 01:43 AM Go to last post
  48. Adjusting for gender in total brain volume

    Is there a way to adjust for the effect of gender on the outcome measure - brain volume without using it as just a co-variate. i.e. can I transform...

    Started by deeo‎, 09-18-2013 05:45 PM
    • Replies: 0
    • Views: 1,946
    09-18-2013, 05:45 PM Go to last post
  49. Mixed effects model residual analysis (help!)

    Hello, I have little experience with mixed-effects models and could do with some help when it comes to checking model assumptions. I am using...

    Started by deeuu‎, 02-10-2015 08:40 AM
    • Replies: 1
    • Views: 2,821
    02-11-2015, 04:34 AM Go to last post
  50. Checking homoscedasticity in repeated measures

    Hello, When checking the assumption of constant variance for repeated measures data, am I correct in thinking that the variance of residuals...

    Started by deeuu‎, 02-18-2015 11:36 AM
    homoscedasticity, regression assumption
    • Replies: 0
    • Views: 1,469
    02-18-2015, 11:36 AM Go to last post
  51. 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: 1,359
    01-11-2016, 06:01 AM Go to last post
  52. Regression to compare mean differences?

    Hi everyone, I am doing a project with two different groups (clinical and control). I want to compare their scores on a couple of variables (ex:...

    Started by DefenceDoom‎, 04-25-2016 05:35 PM
    ancova, mean differences, regression
    • Replies: 1
    • Views: 1,438
    04-26-2016, 06:23 AM Go to last post
  53. Panel Data Regression using Stata/SPSS

    Please I need help. I am trying to run multiple regression analysis using SPSS and Stata but what am getting is not good at all. Can anybody help?...

    Started by Dele‎, 08-30-2011 05:56 AM
    • Replies: 0
    • Views: 4,683
    08-30-2011, 05:56 AM Go to last post
  54. [Mplus] Decreasing iterations changes p value

    I'm doing longitudinal regression analysis using mplus, with cross-lagged models. In my analyses, I compare two models: one without constraints (H0),...

    Started by Delforterie‎, 05-20-2014 04:29 AM
    • Replies: 0
    • Views: 1,533
    05-20-2014, 04:29 AM Go to last post
  55. negative semipartial correlations and their confidence intervals - help!

    hi, i'm in a bind and was hoping someone could shed some light. I have determined negative partial coefficients, standardised partial coefficients,...

    Started by delia‎, 05-14-2013 07:14 PM
    • Replies: 0
    • Views: 1,402
    05-14-2013, 07:14 PM Go to last post
  56. Calculating probabilities from logit parameters estimated with effect coding

    Hello, I calculated this multinomial logit model using an effect coding (-1 0 1). The variable edu3 is the education level (3 categories), sex has...

    Started by Demographer‎, 12-21-2016 03:39 AM
    • Replies: 0
    • Views: 2,080
    12-21-2016, 03:39 AM Go to last post
  57. Translate multinomial logit regression parameters into binomial

    Hello, I have those parameters from a multinomial logit regression that explains Education (L/M/H) by language (Dominant/Other Europe/Non-European)....

    Started by Demographer‎, 05-10-2017 06:12 AM
    • Replies: 0
    • Views: 559
    05-10-2017, 06:12 AM Go to last post
  58. Gauss Elimination

    Hi guys. Im being asked to program Gauss Elimination in R .Im new using this kind of program. It's simple but i don't know how to start. can someone...

    Started by DeMouraBR‎, 06-02-2011 09:45 AM
    • Replies: 13
    • Views: 8,059
    06-09-2011, 10:25 AM Go to last post
  59. Multiple Lineair Regression - Another variable needed ?

    Hey, I'm doing a research on 3 variables, exchange rates, macroeconomic news and net speculative positions. So far I have a regression with...

    Started by Denniono‎, 05-06-2013 04:39 AM
    exchange rates, regression, time
    • Replies: 0
    • Views: 771
    05-06-2013, 04:39 AM Go to last post
  60. Rsquared vs Adjusted Rsquared

    Hello, I have a question regarding to rsquare. I have a model with 1 independent variable which I measure with Rsquare and I have a model with 3...

    Started by Denniono‎, 08-22-2013 10:39 AM
    • Replies: 9
    • Views: 2,286
    08-23-2013, 03:58 AM Go to last post

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