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Forum: Regression Analysis

Linear regression, linear models, nonlinear regression

  1. Selecting Variables for Multiple Regression (Univariate Significance Levels)

    Hi All! I really hope someone can answer my question. I am building multiple linear regressions and I am testing salient variables one by one at...

    Started by Pranaphish‎, 08-27-2013 10:18 PM
    multiple regression, p values, regression models, significance, univariate testing
    • Replies: 9
    • Views: 3,753
    08-28-2013, 07:35 PM Go to last post
  2. Assessing the Fit of a model: multiple regression

    Hi Guys I'm not sure whether this question belongs to this section or in SAS. I'm using SAS to create a regression model for a response variable...

    Started by excelmac‎, 09-29-2013 03:32 PM
    • Replies: 9
    • Views: 1,876
    10-09-2013, 08:41 AM Go to last post
  3. Logistic regression with significant coefficient but .000 Exp(B)

    I am getting an output for a binary logistic regression I can't quite figure out how to interpret. It is a 0/1 binary logit, with 10 numeric IVs....

    Started by mylesg‎, 01-02-2014 05:34 PM
    logistic regression
    • Replies: 9
    • Views: 6,036
    01-03-2014, 04:32 PM Go to last post
  4. hierarchical regression

    Hi, I am trying to analyse my stats results from a three step hierarchical regression and the correlation coefficients tell me that most of my...

    Started by op2222‎, 03-01-2014 10:36 AM
    • Replies: 9
    • Views: 2,512
    03-01-2014, 12:30 PM Go to last post
  5. Regression on count data

    Is it a problem if different observations have different "birth times"? If we want to predict mean count per month (via poisson regression for...

    Started by Englund‎, 05-08-2014 11:47 PM
    • Replies: 9
    • Views: 2,023
    05-12-2014, 11:01 PM Go to last post
  6. Smile Correlation between two non stationary time series

    Hey everyone, I'm trying to figure out if there is significant correlation between two non stationary time series (e.g. temperature on a a given...

    Started by s_chrodinger‎, 07-28-2014 05:51 PM
    correlation, monte carlo, non-stationary, regression analysis, time series
    • Replies: 9
    • Views: 3,957
    08-01-2014, 02:03 PM Go to last post
  7. 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: 10,434
    08-08-2014, 10:18 PM Go to last post
  8. What is a "count" in regression

    It is often said that you should use Poisson regression with data that involves counts. But it seems to me that most of data in the social science is...

    Started by noetsi‎, 08-11-2014 05:04 PM
    • Replies: 9
    • Views: 2,515
    08-11-2014, 08:51 PM Go to last post
  9. Plot for multiple regression

    Hi All, I have a very basic question. When I run a regression to predict Y from X, I basically draw a scatterplot in excel. I am wondering how...

    Started by mac101‎, 08-12-2014 02:48 PM
    multiple regression, regression plot
    • Replies: 9
    • Views: 2,852
    08-12-2014, 06:03 PM Go to last post
  10. Help interpret Odds Ratio for Age in logistic regression

    For the following results, am I correct in stating, for example, that men with children less than 16 years old are less likely to not complete...

    Started by jmhbot‎, 10-07-2014 11:21 AM
    • Replies: 9
    • Views: 2,747
    10-09-2014, 06:36 PM Go to last post
  11. Post What does R, R square , Adjusted R square, STD error of estimates helps for ?

    Hello After I run out the regression analysis, can someone enlighten me what can I get from R, R square, STD Error estimates and the adjusted r...

    Started by hanialbarni‎, 12-06-2014 11:05 AM
    • Replies: 9
    • Views: 3,545
    12-08-2014, 06:40 PM Go to last post
  12. Multi-Level Model

    Why in multi-level models can you get away with fewer observations per predictors? I know that I have heard and seen this before, but I am not...

    Started by hlsmith‎, 12-09-2014 08:57 AM
    • Replies: 9
    • Views: 3,230
    03-11-2015, 11:56 AM Go to last post
  13. Question Polynomial regression - Degree problem

    Hello, I would like to ask that how do I decide exactly what degree polynomial to use in my regression? I have attached the sample file. ...

    Started by Villalobos‎, 12-30-2014 03:37 PM
    • Replies: 9
    • Views: 2,745
    01-03-2015, 06:52 AM Go to last post
  14. meta analysis of many regression studies

    Ive searched the forum for answers to this but no joy yet so please help if you can. I have about 30 published studies looking at the dependence...

    Started by andyspeak‎, 02-17-2015 06:17 AM
    • Replies: 9
    • Views: 2,825
    02-25-2015, 05:31 AM Go to last post
  15. Interpreting coefficients from GLM output

    Hi, I'm trying to educate myself further on using GLM and to do so I figured it'd be easiest to conduct a simple experiment where I knew the...

    Started by schwartzaw‎, 03-04-2015 10:23 AM
    • Replies: 9
    • Views: 2,715
    03-12-2015, 12:54 AM Go to last post
  16. multilevel modelling: predicting random effects for new clusters

    Hi: I have a query I'm hoping someone may be able to help with. I've chatted to a few people and looked at texts and the literature but haven't...

    Started by sigmundo‎, 04-24-2015 05:06 AM
    • Replies: 9
    • Views: 2,954
    04-28-2015, 11:13 AM Go to last post
  17. Exclamation How to use Likert Scale data in regression analysis?

    My knowledge about statistics is elementary and I would really appreciate some help or suggestions in solving my current problem. I am doing a...

    Started by irtiza104‎, 07-14-2015 03:40 PM
    • Replies: 9
    • Views: 3,384
    07-16-2015, 07:57 PM Go to last post
  18. p-value of a coefficient from a regression

    The t-stat value follows a two-tail symmetric t-distribution with mean and median of zero? Am I correct so far? If so, then how can you get a...

    Started by oahz‎, 08-04-2015 10:03 AM
    • Replies: 9
    • Views: 2,175
    08-04-2015, 04:54 PM Go to last post
  19. help required urgent

    A sample of 12 homes sold last month in Minot is selected. Can we conclude that as the size of the home (in square footage) increases, the selling...

    Started by saima1‎, 09-01-2015 01:22 AM
    regression homework
    • Replies: 9
    • Views: 2,652
    09-02-2015, 08:15 AM Go to last post
  20. Question If B predicts A, can A also predicts B?

    Hi everyone, I'm new to multiple regression analysis. I have a question and I hope someone can help answer it. Thank you. In a multiple regression...

    Started by statsnewbie28‎, 09-23-2015 11:04 AM
    dependent variable, multiple regression, predictors
    • Replies: 9
    • Views: 4,115
    09-24-2015, 12:55 PM Go to last post
  21. Nominal predictor with 70 levels....

    I have a nominal level predictor with 70 levels (its units that provide some service). I want to analyze how these units preform on an interval...

    Started by noetsi‎, 12-08-2015 03:13 PM
    • Replies: 9
    • Views: 2,616
    12-16-2015, 01:44 PM Go to last post
  22. 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: 3,212
    01-07-2016, 07:42 AM Go to last post
  23. 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: 1,423
    01-25-2016, 06:01 PM Go to last post
  24. Multiple regression with interaction - and dummy variables?

    Hi guys! So, here's the deal. I'm in a bit of a pickle here :shakehead I'm currently struggling with a take-home exam where I'm having trouble...

    Started by DJB86‎, 03-29-2016 08:55 PM
    • Replies: 9
    • Views: 1,652
    03-31-2016, 09:07 AM Go to last post
  25. Likert Scale as dependent variable

    Hi all, I have a question regarding the analysis of my survey data. I have created one variable of seven likert scale variables after conducting...

    Started by StefanSprenger‎, 04-19-2016 04:07 PM
    • Replies: 9
    • Views: 2,803
    04-20-2016, 04:11 PM Go to last post
  26. Relative impact

    I circle back to this question every few years, it is becoming critical these days and my readings have not turned up a strong consensus on this...

    Started by noetsi‎, 06-20-2016 05:30 PM
    • Replies: 9
    • Views: 3,246
    06-27-2016, 11:02 AM Go to last post
  27. Regression assumptions

    this comes from Introduction to Econometrics by Stock and Watson. On page 161 they note in a footnote "....it might be helpful to note that some...

    Started by noetsi‎, 06-25-2016 02:45 PM
    • Replies: 9
    • Views: 1,874
    06-27-2016, 05:48 PM Go to last post
  28. Binary Logistic Regression Assumptions Testing

    Hi there, I am having difficulties testing some of the assumptions while conducting a binary logistic regression for an exploratory study. 1....

    Started by ting01‎, 08-20-2016 10:41 AM
    • Replies: 9
    • Views: 1,457
    09-03-2016, 03:05 AM Go to last post
  29. Poisson regression for Count data

    Hello Every one, I'am working in Toxicological lab, Where we deal with animal data. I have to perform Poisson Regression for count data but i...

    Started by umang49‎, 09-27-2016 11:59 AM
    • Replies: 9
    • Views: 2,717
    09-28-2016, 06:38 PM Go to last post
  30. Quadratic formula doesn't add up (SPSS)

    Hello, SPSS will draw a quadratic fit line on a scatterplot if requested and provide the formula (see attached). I have typed out the quadratic...

    Started by HanEyeAm‎, 04-07-2017 09:28 PM
    • Replies: 9
    • Views: 1,183
    04-09-2017, 07:46 PM Go to last post
  31. Log regressions

    So between these two log regressions: 1) transform y into log but keep X normal 2) transform both the y and x into log When or what would be a...

    Started by Jazz3‎, 03-31-2017 04:05 AM
    • Replies: 9
    • Views: 985
    04-19-2017, 02:15 AM Go to last post
  32. Unhappy I need help with my regression analysis for research capstone.

    Hi all, I'm new to regressions and also new to posting here. My topic is: How have E-books Affected College Textbook Prices? My hypothesis...

    Started by tlowe‎, 03-22-2017 02:59 PM
    • Replies: 9
    • Views: 1,094
    03-23-2017, 08:45 AM Go to last post
  33. what to do with "bad" logistic regression results

    I ran a simple logistic regression in R and here are my results. my independent variables are all "counts" and I coded my Y as 0 and 1. This is a...

    Started by semidevil‎, 01-18-2017 04:16 PM
    • Replies: 9
    • Views: 3,951
    01-23-2017, 12:18 PM Go to last post
  34. Spearmans test...?!

    Im conducting a project and it is based on radiographs, basically i look at a radiograph and decide how difficult it is likely to be i have done this...

    Started by Rara‎, 03-29-2008 08:59 AM
    • Replies: 8
    • Views: 2,902
    03-29-2008, 01:29 PM Go to last post
  35. Testing for difference 2 regression models

    Hello, I am working on multiple regressions at the moment and have come to a point that I need a little assistance. I have the following question:...

    Started by devreede‎, 11-28-2008 12:16 PM
    • Replies: 8
    • Views: 25,969
    11-29-2008, 11:29 AM Go to last post
  36. ANOVA confusions- Please Help

    Hello, I was wondering if you could please offer any advice as I appear to have got rather muddled. I am writing a resesarch proposal, and I...

    Started by GuineaPig‎, 12-09-2008 03:35 PM
    • Replies: 8
    • Views: 2,891
    12-10-2008, 11:14 PM Go to last post
  37. adjusting a proportion score (controling for age)

    I have 20 yes/no ratings (did this product help you). People were able to rate as many of the 20 products as they used (on average people rated 5...

    Started by chinaplate‎, 12-15-2008 10:19 PM
    • Replies: 8
    • Views: 4,369
    12-15-2008, 11:23 PM Go to last post
  38. multiple comparisons

    Hi, I'm a vet doing a research project, but am not really strong in stats. I have a question about whether correction for multiple comparisons is...

    Started by jknuppel‎, 02-09-2009 09:13 PM
    • Replies: 8
    • Views: 3,278
    02-13-2009, 02:12 AM Go to last post
  39. Collinearity in Logistic Regression

    If my independent variables are correlated in Linear Regression, I can first, check it using VIF, and solve it (PLS, other ways). What do I do if...

    Started by WeeG‎, 08-19-2010 04:28 AM
    • Replies: 8
    • Views: 27,082
    08-24-2010, 01:50 AM Go to last post
  40. Confidence Intervals for Estimates in Multinomial Logistic Regression

    Hello all, Is there a way to calculate a confidence interval for the estimates occurances of a dependent variable when using multinomial logistic...

    Started by PsychResearcherRASIS‎, 02-07-2011 11:09 AM
    • Replies: 8
    • Views: 8,863
    06-05-2011, 03:51 PM Go to last post
  41. problem with MR

    Hi, I have a problem with the results of MR and I hope somebody can help me:) conducting MR with Enter method, I got a model which is not...

    Started by jana0303‎, 02-24-2011 03:29 AM
    • Replies: 8
    • Views: 2,576
    02-24-2011, 04:01 PM Go to last post
  42. 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: 4,487
    04-29-2011, 11:00 PM Go to last post
  43. Question covariance and variance of BLUE

    Consider an RBD with 5 replications and 4 treatments t_1,t_2,t_3,t_4. We are given the following three treatment-contrasts: \frac{t_1-t_2}{2}...

    Started by Sambit‎, 06-10-2011 08:45 AM
    • Replies: 8
    • Views: 2,632
    06-12-2011, 11:13 AM Go to last post
  44. Interaction Term in Logistic Regression

    I'm reading Kutner, et al., Applied Linear Statistical Models (5th), and came across something I don't recall the authors explaining. I vaguely...

    Started by bryangoodrich‎, 06-17-2011 12:07 AM
    • Replies: 8
    • Views: 9,039
    06-17-2011, 05:10 PM Go to last post
  45. Regarding negative correlation and negative variance estimation result

    In ANOVA, we sometimes talk about that variance estimation can get negative result when there is negative correlation. I do not understand what...

    Started by winecoding‎, 09-12-2011 10:24 AM
    anova, correlation, variance estimation
    • Replies: 8
    • Views: 5,302
    09-12-2011, 11:32 PM Go to last post
  46. Analyses of count data for seedling survival: poisson or logistic regression?

    Am I dealing with survival data (binary) or count data, and which is the best statistical analysis? I have counted seedlings surviving in each of...

    Started by ndafuda‎, 06-15-2012 04:38 AM
    • Replies: 8
    • Views: 3,893
    08-01-2012, 04:42 AM Go to last post
  47. Multiple Regression Question

    This is my data: Bars

    Started by student865‎, 11-10-2011 09:54 AM
    • Replies: 8
    • Views: 3,244
    11-10-2011, 02:17 PM Go to last post
  48. Observing relationships through regression.

    Hi all - I hope this is in the right sub-forum... I have a question regarding regression and working out the relationship between two variables....

    Started by _Alex_‎, 11-29-2011 12:24 PM
    • Replies: 8
    • Views: 2,811
    11-30-2011, 04:37 PM Go to last post
  49. Maximum likelihood model estimation

    W3 is a duration variable. Values greater than or equal to 3 are incomplete durations. Estimate an appropriate model for this variable and show how...

    Started by samulleg364‎, 02-09-2012 12:58 PM
    • Replies: 8
    • Views: 2,573
    02-10-2012, 06:29 PM Go to last post
  50. Regression table interpretation problem

    Hello all, I am a complete beginner in statistics but I have come across a table I need to interpret for my research. Although it's probably a...

    Started by Nebounette‎, 02-28-2012 04:54 PM
    • Replies: 8
    • Views: 3,245
    02-29-2012, 09:58 AM Go to last post
  51. Cool Regression with non- parametric data....

    Hello! I have conducted the normality test Anderson-Darling on my data, and with a p value of <0,010, I guess that the data are not normal...

    Started by Rebecka‎, 03-24-2012 08:35 AM
    • Replies: 8
    • Views: 5,604
    03-26-2012, 03:42 AM Go to last post
  52. Logistic regression convergence issues

    Hi Folks! I'm using logistic regression for classifying records into groups. The issue with logistic regression is that if any cell in the...

    Started by jrai‎, 03-30-2012 12:24 AM
    • Replies: 8
    • Views: 6,823
    04-04-2012, 01:12 PM Go to last post
  53. Regression analysis of more than two independent and dependent variables

    Hello, I want to find the relationship between independent and dependent variables using regression analysis. There are 5 IV and 4 DV. Please...

    Started by ashima‎, 04-11-2012 07:20 AM
    • Replies: 8
    • Views: 5,433
    05-14-2012, 09:50 AM Go to last post
  54. Sigmoid curve

    Hi, Is it possible to linearise data for a sigmoid curve? To be clear, I do not mean a logistic function! The data are not between 0 and 1! I...

    Started by rmoerken‎, 06-04-2012 07:31 AM
    • Replies: 8
    • Views: 4,376
    06-12-2012, 04:39 PM Go to last post
  55. Calculating R^2: to use or not use the least-squares line

    Dear Stats Forum, I am a grad student with an introductory stats background. For my research, I'm conducting an experiment to compare two types of...

    Started by hollywas‎, 07-21-2012 01:57 PM
    • Replies: 8
    • Views: 1,593
    07-21-2012, 05:37 PM Go to last post
  56. Error contribution from covariance in linear regression

    Hello, I try to consider the covariance in the error analysis of a linear regression with few data points. I could not find for this a worked...

    Started by Asterix‎, 07-24-2012 08:35 AM
    • Replies: 8
    • Views: 3,064
    08-02-2012, 08:07 AM Go to last post
  57. Poynomial Regression through the origin

    I am trying to program in SQL a polynomial regression of degree two with a zero intercept. I can't seem to find the appropriate literature on this...

    Started by coling‎, 07-24-2012 03:43 PM
    • Replies: 8
    • Views: 4,202
    07-24-2012, 05:50 PM Go to last post
  58. Problems with R^2

    Hi, I have an assignment in which measurements of 5 independent variables were measured for 1 dependent variable. The first questions asks which of...

    Started by gibb‎, 09-28-2012 10:13 AM
    • Replies: 8
    • Views: 2,422
    09-29-2012, 01:59 PM Go to last post
  59. 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: 2,765
    11-29-2012, 01:43 AM Go to last post
  60. Variable selection in multiple regression based on regression itself results

    Hi everybody, I have a question relative to the multiple linear regression. Here is the case: Y=dip var x1, x2, x3= indip var suppose that I have...

    Started by nelson85‎, 01-17-2013 06:54 AM
    predictors, regression, rsquare
    • Replies: 8
    • Views: 2,047
    01-25-2013, 10:04 AM Go to last post

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