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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Talking Observed versus Expected Slope Comparison

    Hello, I am performing an analysis (for dissertation project) where I am comparing the sum of branch lengths from phylogenetic trees reconstructed...

    Started by CrystalH‎, 03-22-2013 01:28 PM
    phylogenetic diversity, regression analysis, slope
    • Replies: 2
    • Views: 3,575
    03-22-2013, 07:57 PM Go to last post
  2. Logistic Regression Probability

    Hi Guys, I'm working on a simple logistic regression problem. I'm wanting to find the exact value of x(independent variable) that gives a 0.5...

    Started by csb89‎, 04-19-2011 04:00 PM
    • Replies: 4
    • Views: 2,558
    04-22-2011, 02:47 PM Go to last post
  3. Introduction of Heteroscedasticity with additional variable

    Hi everyone, I am running an analysis in which I am also checking for heteroscedasticity of my data. The tests tell me that I have...

    Started by Cunner‎, 10-29-2013 02:46 AM
    • Replies: 3
    • Views: 1,536
    10-29-2013, 08:19 AM Go to last post
  4. Regularized Canonical Correlation Analysis

    Hi, I have a question about sample size and regularized canonical correlation analysis. Is a sample size of 15 unreasonable to use in a regularized...

    Started by cupcake‎, 05-01-2011 08:05 PM
    canonical correlation, data analysis, regularized, sample size
    • Replies: 0
    • Views: 2,046
    05-01-2011, 08:05 PM Go to last post
  5. Same variable on both sides - how to resolve this?

    I have a regression which is supposed to capture the effect of R&&D expenditures on stock returns, given some controllers X1, X2 and volatility, i.e....

    Started by Cupcaker‎, 09-10-2016 07:01 AM
    • Replies: 1
    • Views: 1,672
    09-11-2016, 07:42 AM Go to last post
  6. relative risk ratios and standard errors

    Hey forum, Odds ratios or relative risk ratios are calculated by exponentiating the coefficients (from a binary or multinomial logit model),...

    Started by cureeous‎, 05-04-2012 12:16 AM
    • Replies: 2
    • Views: 2,852
    05-04-2012, 08:17 AM Go to last post
  7. Analysis of promotional data by department

    Hi all, I have recently started an internship with a major UK retailer. My project is to come up with a model (and analysis) for promotions that...

    Started by cus003‎, 07-11-2013 02:44 PM
    • Replies: 6
    • Views: 1,196
    07-15-2013, 08:38 AM Go to last post
  8. Exclamation Finding standard error for elasticity (log-log model)

    Hi guys, Can anyone help with this? In(sub) = 3.43 - 0.899 In(Price) + 0.374 In(Age) + 0.141 In(Age)In(Price) + 0.229 In(Characters) The...

    Started by cuteylion‎, 11-08-2010 04:04 AM
    • Replies: 0
    • Views: 4,930
    11-08-2010, 04:04 AM Go to last post
  9. Help with creating a dummy variable with a categorical variable.

    I am very new to stats and this is not my thing. I need help in a class with creating dummy variables for the variable "education level". Im not...

    Started by cwcannon‎, 12-07-2014 10:06 PM
    • Replies: 1
    • Views: 1,434
    12-08-2014, 02:54 AM Go to last post
  10. Easy but need help

    Hi all! I am doing an experiment involving the age children started wearing glasses and comparing this to the age a parent started wearing glasses....

    Started by cwdaughtry‎, 12-15-2012 03:39 PM
    • Replies: 1
    • Views: 1,381
    12-15-2012, 09:31 PM Go to last post
  11. Can I compare regression models with same # predictors and same sample?

    Hi there, As a part of my dissertation I want to compare a focal, new, variable against other well-known predictors of my outcome, so I plan to...

    Started by CWRUgradstudent‎, 04-27-2014 11:32 PM
    model comparison, multicollinearity, regression, steiger's z
    • Replies: 7
    • Views: 1,780
    04-28-2014, 11:49 AM Go to last post
  12. Need some help mining.

    Hello all, This is my first post here. I have little stats experience and I may have bit off more than I can chew. I read around for a few hours...

    Started by cxavierc21‎, 07-24-2013 08:24 AM
    • Replies: 2
    • Views: 1,215
    07-26-2013, 08:50 AM Go to last post
  13. Prediction interval behaviour close to the origin

    Hi I have a simple linear regression model, for which I have calculated the Confidence and Prediction Intervals. The model is fixed at the origin...

    Started by cyberbunny‎, 03-21-2009 07:30 AM
    • Replies: 0
    • Views: 2,738
    03-21-2009, 07:30 AM Go to last post
  14. LSDV dropping states/variables?

    So I am running a Least Squares Dummy Variable Regression (LSDV1) involving data from 21 states observed 3 times (2007, 2008, 2009) and dropping one...

    Started by cynicalflyer‎, 02-21-2014 12:34 PM
    • Replies: 1
    • Views: 1,242
    02-21-2014, 01:49 PM Go to last post
  15. Use of factor analysis + regression

    Independent Variable: I have a survey of 50 states indicating the amount of control the state board of education has in 31 areas answered on a three...

    Started by cynicalflyer‎, 08-19-2014 11:49 AM
    • Replies: 6
    • Views: 2,867
    08-26-2014, 05:15 PM Go to last post
  16. How2interpret inconsistent Beta values in different steps of hierarchical regression?

    I did hierarchical regression analysis on my data due to having moderation effects in my research model. R2 increased from .695 in model1 (main...

    Started by Cyrs‎, 07-20-2012 03:57 AM
    • Replies: 3
    • Views: 6,758
    07-20-2012, 02:50 PM Go to last post
  17. Log-linear Regression Models with only the cell mean, variance, and sample size

    Hi, I am working on a project with a contingency table with provide only the mean, variance, and sample size, but don't have the exact count of...

    Started by cyrus‎, 07-15-2011 01:10 AM
    • Replies: 0
    • Views: 2,056
    07-15-2011, 01:10 AM Go to last post
  18. potential heteroskedasticity & autocorrelation problem with pooled cross-section data

    hello 1) my data: i have collected a few thousand property transactions over the last 15 years. for each transaction i have got the price and the...

    Started by czeiny‎, 01-11-2012 02:16 PM
    • Replies: 2
    • Views: 4,058
    01-11-2012, 03:56 PM Go to last post
  19. Unexpected output for multivariate logistic regression

    Hi, After I'd tested a couple of univariate logistic regressions for all of my IVs, I runned a multivariate logistic regression with all the IVs...

    Started by c_alderweireld‎, 07-16-2014 05:28 AM
    • Replies: 2
    • Views: 1,341
    07-16-2014, 07:50 AM Go to last post
  20. Help

    Hi Everyone, Is a sample of 20 companies too small for a dividend payout study? in SPSS I get a negative Adjusted R sq you will find attached...

    Started by c_b_s90‎, 05-22-2015 08:14 PM
    • Replies: 1
    • Views: 1,295
    06-07-2015, 01:51 PM Go to last post
  21. Help needed with ANOVA analysis

    ANOVA df SS MS F Significance F Regression 6 5510.4 918.4 11.67 0.0081 Residual 5 393.2 78.65 Total ...

    Started by d.g.aspinall‎, 11-17-2008 07:46 PM
    • Replies: 1
    • Views: 5,041
    11-18-2008, 03:32 PM Go to last post
  22. Interpreting Panel data analysis

    Hi there, This is my first statistical question on this forum. I am busy with my thesis, so I think a couple more will follow in the coming...

    Started by daang90‎, 02-23-2014 01:44 PM
    • Replies: 1
    • Views: 2,053
    02-24-2014, 04:47 AM Go to last post
  23. Checking temporal dependency

    Hi guys, this is my problem: I have performed some experimental tests (tomographies) on 40 samples. These samples are made by four different...

    Started by dado92‎, 01-11-2017 12:10 PM
    temporal dependency
    • Replies: 2
    • Views: 2,711
    01-11-2017, 01:12 PM Go to last post
  24. Post Logistic Regression: To dummy code or not to? Which backward elimination to use?

    I have 10 binary dependent variables (disease prevalence: yes/no, 1/0). I want to do a logistical regression with each of them with the following...

    Started by Daedalus‎, 02-21-2013 12:13 PM
    backward elimination, binary variables, dummy coding, logistical regresion
    • Replies: 5
    • Views: 16,405
    02-22-2013, 11:13 AM Go to last post
  25. Binary logistic regression. missing values

    Hi. I have a question about missing values. My dependent value is whether the respondend voted in the last election or not - N=2600 cases. I want...

    Started by Dan23‎, 12-19-2012 04:55 AM
    missing values, regresion analysis
    • Replies: 0
    • Views: 1,155
    12-19-2012, 04:55 AM Go to last post
  26. Exclamation Interpretation of coefficient differences across sample groups (please help!?)

    Hello! Before I start the whole story, I am going to sumamrize my main question beforehand so the story will hopefully make more sense. Mainly,...

    Started by Dana‎, 04-25-2012 02:01 PM
    coefficient, interpretation, multiple regression, research, wald
    • Replies: 0
    • Views: 1,962
    04-25-2012, 02:01 PM Go to last post
  27. Red face Combining Regressions

    Hi, I have several different regressions for various sites within an area estimating Y from X. I would like to combine all these sites in to...

    Started by danboyk‎, 12-19-2007 10:01 AM
    • Replies: 3
    • Views: 7,610
    12-28-2007, 11:31 AM Go to last post
  28. question~sum of (residual*Xi)

    Hi, I know it might sound stupid but I do not understand why the fact that sum of residuals equals zero implies the sum of (residual i*Xi)...

    Started by dandelion‎, 01-26-2013 01:04 AM
    • Replies: 4
    • Views: 6,288
    01-27-2013, 03:18 AM Go to last post
  29. Variables in Logistic Regression Analysis

    I am trying to come up with a model to predict a binary dependent solution. I want to incorporate ordinal independant variables as the predictors. ...

    Started by danh32‎, 07-22-2010 12:32 PM
    • Replies: 2
    • Views: 7,286
    07-23-2010, 10:10 AM Go to last post
  30. Finding Significant Difference between Linear Regressions

    Hello. I have a scatterplot with two different sets of data plotted. Each individual set has its own linear regression formula and R-squared...

    Started by danhageman‎, 07-16-2015 11:31 PM
    outlier detection, p-value, regression analysis, scatter plot, significance
    • Replies: 0
    • Views: 1,029
    07-16-2015, 11:31 PM Go to last post
  31. [R] How to calculate Confidence Interval for a prediction using Partial Regression?

    Dear all, I have two highly correlated variables (y and x), and both of them depend on a third variable (A, for Area). Multiple regression...

    Started by Dani DQ‎, 06-11-2012 06:15 PM
    • Replies: 0
    • Views: 1,670
    06-11-2012, 06:15 PM Go to last post
  32. Trying to interpret my results

    I have to find out who the movers and shakers are of the middle eastern stock markets ive ran a regression analysis of the prices indices in local...

    Started by daniblu7‎, 11-15-2013 04:23 AM
    • Replies: 3
    • Views: 1,323
    11-15-2013, 10:31 AM Go to last post
  33. What is the “pdm” stat in the “rms” R package?

    I am new to the world of Regression in statistics and I have been doing a research in which I am building an ordinal logistic regression model (ORM)....

    Started by danielalencar‎, 11-27-2014 07:17 PM
    measurement, orm, pdm, regression, rms
    • Replies: 0
    • Views: 3,101
    11-27-2014, 07:17 PM Go to last post
  34. What econometric method for macroeconomic trade data?

    Hello, I am working with a data set with trade data of one specific good of 173 countries from 1990 to 2010 in STATA. For every year and a pair of...

    Started by DanielFox‎, 09-30-2013 04:10 PM
    • Replies: 3
    • Views: 2,996
    10-01-2013, 08:57 AM Go to last post
  35. Do you think there is any correlation between this two variables?

    Do you think there is any correlation between these two variables? scatterplot: http://www.directupload.net/file/d/3641/5g58d9hx_jpg.htm data...

    Started by DanielFox‎, 06-02-2014 09:33 AM
    correlation
    • Replies: 1
    • Views: 1,446
    06-02-2014, 09:34 AM Go to last post
  36. Determine if a quadratic regression is appropriate for the data?

    How does one determine if a quadratic regression is appropriate for the data? I am using the programming language R. I have data that I would like to...

    Started by danielh‎, 06-21-2014 08:28 PM
    • Replies: 1
    • Views: 1,354
    06-22-2014, 01:12 AM Go to last post
  37. Assessing model fit

    I have built two logistric regression models: one forced entry model that features some highly insignificant variables, and a stepwise one that,...

    Started by daniel_ev‎, 07-09-2012 11:37 AM
    logistic regression
    • Replies: 1
    • Views: 1,562
    07-09-2012, 12:48 PM Go to last post
  38. Distribution of fixed effects

    Hi all, Let me shortly introduce my research: I am looking at whether companies outperform each other in investments. To do this I observe them at...

    Started by daniel_smit‎, 06-09-2017 05:07 AM
    distribution, fixed effect model, normal distributed, panel data
    • Replies: 3
    • Views: 868
    06-09-2017, 11:56 AM Go to last post
  39. Compare regression coefficients of two settings with similar samples

    Dear Statisticians, For my thesis I am currently examining whether the accounting principles have an influence on the relation between having a...

    Started by Daniel_W‎, 06-09-2017 03:32 AM
    • Replies: 0
    • Views: 336
    06-09-2017, 03:32 AM Go to last post
  40. independant variables?

    I'm a little confused on the whole dependent-independent thing.... I'm doing a multiple linear regression with 13 variables in order to predict...

    Started by danjohnson10‎, 02-08-2011 03:50 PM
    • Replies: 0
    • Views: 2,059
    02-08-2011, 03:50 PM Go to last post
  41. Impossible exam question!

    I just got done taking an exam by an evil and cruel professor who likes to throw in problems that he's never discussed in class, never assigned for...

    Started by danjohnson10‎, 04-27-2011 08:11 PM
    • Replies: 8
    • Views: 4,480
    04-29-2011, 11:00 PM Go to last post
  42. which model to use?

    I have a dependent variable that is limited and discrete (it goes from -9 to 9 in whole numbers), yet the residuals produced from a linear regression...

    Started by danjohnson10‎, 07-12-2011 04:46 PM
    • Replies: 10
    • Views: 3,248
    08-03-2011, 01:34 PM Go to last post
  43. Research Question Regarding Logistic Regression

    Hi all, I am conducting a medical study with n=179 subjects and have something like 30 independent variables that I am comparing to 1 outcome. I...

    Started by DanMed‎, 08-15-2011 02:48 PM
    • Replies: 3
    • Views: 2,778
    08-16-2011, 12:32 PM Go to last post
  44. Complicated Research quesiton

    Im looking to do some research in the social science field and I have to do a statistical analysis of a complicated set of self report measures. I'd...

    Started by danmpc‎, 12-28-2016 06:52 AM
    • Replies: 8
    • Views: 3,581
    12-30-2016, 12:33 PM Go to last post
  45. Seemingly Unrelated Regression vs Maximum Likelihood ~ best for constraints?

    I am currently doing research and I am utilizing an almost ideal demand system. It is essentially a regression equation that seeks to model consumer...

    Started by dannylimstata‎, 04-20-2012 03:10 AM
    • Replies: 0
    • Views: 1,629
    04-20-2012, 03:10 AM Go to last post
  46. Ordinal vs Multinomial

    I am interested why predicted probabilities for ordinal and multinomial regressions differ? Can we explain this difference in terms of multinomial...

    Started by Dannysaf‎, 05-31-2015 05:25 PM
    • Replies: 0
    • Views: 1,122
    05-31-2015, 05:25 PM Go to last post
  47. Please help, how do i interpret this?

    okay the regression formula that i have worked out is y=12559.7477 + 4265.7566X i have to discuss the size, sign, significance and meaning of this. I...

    Started by danswe3‎, 03-26-2011 04:09 PM
    • Replies: 1
    • Views: 6,113
    03-27-2011, 08:49 PM Go to last post
  48. what is cross section regression analysis?

    Can someone help me by defining what is cross section regression analysis and the limits of this. :)

    Started by danswe3‎, 03-29-2011 04:33 AM
    • Replies: 1
    • Views: 22,024
    04-06-2011, 12:40 PM Go to last post
  49. what does the parameter a and b mean?

    I have worked out the regression equation Y= 12559.7477 + 4265.7566X What does 12559.7477 and 4265.7566X mean? Is 12559.7477 the y-intercept...

    Started by danswe3‎, 03-29-2011 04:54 AM
    • Replies: 0
    • Views: 2,315
    03-29-2011, 04:54 AM Go to last post
  50. How can I conduct a regression analysis with these data?

    Hey, I am currently writing a working paper that attempts to find out which factors determine the location choice of Chinese firms when they invest...

    Started by danvik‎, 04-29-2013 05:36 AM
    • Replies: 0
    • Views: 1,041
    04-29-2013, 05:36 AM Go to last post
  51. Angry Appropriate null hypothesis for a two-stage regression

    Hi – thanks everyone for your help in advance. I’m working on a two-stage regression, in which a coefficient from the first regression is used as an...

    Started by Daoist‎, 04-23-2012 08:25 AM
    hypothesis testing, multistage, null hypothesis, two stage
    • Replies: 0
    • Views: 1,404
    04-23-2012, 08:25 AM Go to last post
  52. Power-law relation (Help Please)

    Hi there, I wonder if you can kindly help me with questions below 1) I have data to apply for a power-law relation (A=B*C^D). I am using excel to...

    Started by dara‎, 07-23-2011 04:13 PM
    • Replies: 3
    • Views: 2,205
    07-26-2011, 09:28 PM Go to last post
  53. Moderation graphs

    Hi all, (I hope I'm posting this in the right sub-forum) I have two data sets for which I've done hierarchical regression analysis to test for...

    Started by darc‎, 09-02-2009 06:10 AM
    • Replies: 0
    • Views: 13,215
    09-02-2009, 06:10 AM Go to last post
  54. Error distribution and non linear models.

    Ok, I am reformulating this question because it started rather silly. As I always point out, my background is not statistics so please excuse my...

    Started by darfunkel‎, 02-16-2011 11:31 AM
    • Replies: 0
    • Views: 1,983
    02-16-2011, 11:31 AM Go to last post
  55. Please help with the regression analysis result

    Greetings everyone, I'm currently working on my Bachelor thesis relating to behavioral finance. My topic requires me to run a regression analysis...

    Started by darkblade0808‎, 09-20-2015 11:05 PM
    • Replies: 4
    • Views: 2,843
    07-24-2016, 02:41 AM Go to last post
  56. Estimation - the best factor?

    I need your help if you can. I get some measurement results. If everything work correct results keep close to nominal value: If the...

    Started by darwoz‎, 12-20-2013 02:40 PM
    • Replies: 0
    • Views: 1,796
    12-20-2013, 02:40 PM Go to last post
  57. SEM logic: beginner question

    Hello everybody, I have a question with regard to the basic logic of SEM: How is it plausible to expect that, for example, four indicators (a1,...

    Started by DataMonkey‎, 06-07-2011 03:47 PM
    • Replies: 2
    • Views: 2,443
    06-11-2011, 05:26 AM Go to last post
  58. Benefits of converting dependent variable to log form?

    For regression analysis, what is the benefit of converting the dependent variable to log form. I'm using hourly wages as the dependent variable. ...

    Started by dataset‎, 01-16-2014 06:00 AM
    • Replies: 5
    • Views: 2,361
    01-16-2014, 11:11 AM Go to last post
  59. Question about sorting data so I can run regressions

    I have two data sets that I combined using the 'append' command in Stata. Each data set has about 8,500 observations - essentially people who agreed...

    Started by dataset‎, 02-15-2014 04:15 PM
    • Replies: 1
    • Views: 1,324
    02-15-2014, 05:00 PM Go to last post
  60. 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: 1,523
    03-01-2014, 05:18 PM Go to last post

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